Standard & rechargeable batteries

Discover our selection of the best rechargeable batteries and cells in 2026.

There is a considerable choice when it comes to batteries, rechargeable batteries and cells on today's market. The technical needs required by the large number of electrical devices that exist mean that batteries are available in a great many variants, both in terms of formats (cylindrical, square or button cells) and power, capacity, voltage, dimensions or types (Lithium, alkaline, saline, Ni-MH...). Certain brands, such as Energizer or Duracell, need no introduction, and act as a reference, and some types of battery are extremely popular and used all over the world.
We have therefore decided to present, in this category of our shop, a wide range of batteries, rechargeable or not, spread across different formats, choosing only the best models and the best brands, among the most common or sought-after battery types.
You will therefore find here the best in batteries and rechargeable cells in 2026

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I - AAA batteries

Ultra compact and commonly used in a large number of devices (remote controls, toys, lamps…), AAA / R03 / LR03 batteries (also called Micro batteries) are extremely practical and popular. We present here the batteries and rechargeable cells in AAA format that we recommend.

Duracell Ultra Power AAA (x12)

$6.95 (583)

Do Duracell batteries really need an introduction? Discover the Ultra Power AAA (1.5V), sold here in packs of 12.

  • Voltage: 1.5V
  • Rechargeable: No
  • Pack size: Pack of 12
  • Duracell quality, long shelf life, charge tester
Duracell brand alkaline batteries are among the most widely used in the world. These Ultra Power AAA / R03 batteries are equipped with a Powerchek load tester (activated by finger pressure) which lets you check their level. These 1.5V batteries are sold in packs of 12. Their energy can be conserved for up to 10 years, thanks to Duralock technology. The pink rabbit brand offers here one of the best batteries in AAA format.
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Panasonic Eneloop AAA 800mAh

15.94€ (5376)

The benchmark AAA rechargeable batteries: up to 2100 charge cycles, ready to use and able to keep 70% of their energy after 10 years of storage.

  • Capacity / Voltage: 800 mAh / 1.2V
  • Rechargeable: Yes, up to 2100 cycles
  • Pack: Pack of 4 (Ni-MH)
  • 70% capacity kept after 10 years, ready to use
Rechargeable up to 2100 times, which is exceptional, the Eneloop AAA from Japanese brand Panasonic are designed to be as durable as possible. With a capacity of 800 mAh and already charged at purchase (with solar energy, for eco-responsibility), these cells keep up to 70% of their capacity after 10 years of storage. That is why they are the first choice of forward-thinking users who like to keep a number of them in stock, ready to use.
The Eneloop AAA have been with us for years, and they have never disappointed. We drop them into remotes, controllers, a small headlamp and a mouse, and they get the job done without complaint. Like their bigger AA siblings, their key strength is low self-discharge: forgotten for months in a drawer, they come out almost full, ready to use, where other cells would already be flat. The 800 mAh capacity is naturally more modest than an AA, but it is more than enough for AAA-powered devices, which are usually low-drain. Sold in packs of 4, they quickly pay off against disposables, especially with a good charger. One usage tip: like any NiMH cell, they deliver 1.2V instead of 1.5V, with no consequence in the vast majority of cases. Reliable, durable and eco-friendly, they are one of those smart buys you never regret.
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Eneloop Pro AAA 930mAh Panasonic Eneloop Pro AAA 930 mAh rechargeable batteries
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Panasonic Eneloop Pro AAA 930mAh

34.99€ (120)

The high-capacity AAA version of the Eneloop: 930 mAh to last longer in power-hungry devices, wireless mics, headlamps or demanding mice.

  • Capacity / Voltage: 930 mAh (min. 900) / 1.2V
  • Rechargeable: Yes, up to 500 cycles (Ni-MH)
  • Pack size: Pack of 4
  • Highest AAA capacity in the Eneloop range
The Panasonic Eneloop Pro AAA are the high-capacity variant of the Eneloop line in the AAA format. With 930 mAh (versus 800 mAh for standard Eneloop), they are the brand's most enduring AAA NiMH cells, designed for devices that drain batteries fast: wireless mics, powerful headlamps, gaming mice, toys. Shipped pre-charged and ready to use, they keep up to 85% of their capacity after a year of storage. In return, they handle fewer cycles than standard Eneloop (about 500). Sold in packs of 4.
In AAA, capacity quickly makes the difference, and that is where the Eneloop Pro stand out. We put them in a wireless lavalier mic and a trail headlamp, two devices that draw hard on small cells, and the runtime gained over standard AAA is clear: you record longer, you light longer. They arrive charged and ready to use, and hold their charge well between sessions. As on the AA version, the trade-off is the cycle count: about 500 recharges, versus over 2000 for standard Eneloop, and slightly faster self-discharge at rest. For remotes or a clock, standard Eneloop remain more suitable and more durable. But for any power-hungry AAA device, these Pro offer the best runtime available in this format. A worthwhile investment for anyone using demanding gear.
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II - AA batteries

AA (or LR6) batteries are the most common batteries in the world, and their popularity is understandable, given their large capacity for a particularly compact and practical format. Here is our selection of batteries and rechargeable cells in AA format.

Energizer Ultimate Lithium AA (x4)

10.97€ (25503)

The longest-lasting AA battery in the world: the Energizer Ultimate Lithium takes on the most power-hungry devices, from deep cold to heat, with 25 years storage.

  • Voltage: 1.5V (lithium)
  • Format: AA / LR6 / FR6
  • Pack: Pack of 4
  • Storage: Up to 25 years
  • The most enduring AA battery, from -40 to 60°C
Energizer Ultimate Lithium AA batteries (LR6 / FR6) are 1.5-volt lithium batteries, billed as the longest-lasting AA batteries in the world. Far more enduring than alkaline on power-hungry devices (cameras, flashes, GPS, detectors, toys, controllers), they work from -40 to 60°C and are 33% lighter. Sold in packs of 4, they store for up to 25 years in the packaging and resist leaks.
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Varta 4006 AA Batteries (x40)

$14.88 (358)

Batteries from the Varta Industrial line are both economical and reliable, and we offer them here packaged in 40s.

  • Capacity / Voltage: 2600mAh / 1.5V
  • Rechargeable: No
  • Pack size: Pack of 40
  • Affordable, no need to buy more for a long time
Made in Germany, Varta Industrial batteries are both reliable and worthy of the highest quality standards. Guaranteed to be stored for 10 years, and with an excellent quality/price ratio, these Alkaline AA / LR6 batteries have a nominal capacity of 2600mAh. These 1.5V batteries will be perfect for powering your devices. And after buying a set of 40 units, you should be set for quite a while.
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Panasonic Eneloop AA 1900mAh

41.01€ (13445)

The benchmark AA rechargeable batteries: up to 2100 charge cycles, ready to use and able to keep 70% of their energy after 10 years of storage.

  • Capacity / Voltage: 1900 mAh (min.) / 1.2V
  • Rechargeable: Yes, up to 2100 cycles
  • Pack: Pack of 8 (Ni-MH)
  • 70% capacity kept after 10 years, ready to use
Rechargeable up to 2100 times, Panasonic Eneloop AA batteries are the benchmark for durable NiMH cells. With a minimum capacity of 1900 mAh (2000 mAh typical), they ship pre-charged with solar energy and ready to use. Their very low self-discharge lets them keep up to 70% of their capacity after 10 years of storage, making them the choice of forward-thinking users. Sold in packs of 8, they are a great replacement for disposable batteries in controllers, remotes, toys, mice and flashes.
It is hard to find anything more reliable than Eneloop, and you quickly understand why they are so widely praised. We use them daily in game controllers, remotes, a wireless mouse and a camera flash, and they take it all without complaint. Their real strength is low self-discharge: pulled from a drawer after months of neglect, they are still full and ready to use, where cheap rechargeables would be flat. On the flash, they keep the pace without weakening, a good sign of their consistency. Sold in packs of 8, they quickly pay for themselves against disposables, especially with a good charger. The 1900 mAh capacity is slightly below the Pro versions (2500 mAh), but in return they handle many more cycles and age better. The only small downside, like any NiMH cell, is that they deliver 1.2V instead of the 1.5V of an alkaline, which can bother a few very voltage-sensitive devices. For everything else, it is a purchase you never regret.
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Eneloop Pro AA 2500mAh Panasonic Eneloop Pro AA 2500 mAh rechargeable batteries
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Panasonic Eneloop Pro AA 2500mAh

25.90€ (453)

The high-capacity version of the Eneloop: 2500 mAh to last longer in power-hungry devices like camera flashes, game controllers or demanding toys.

  • Capacity / Voltage: 2500 mAh (min. 2450) / 1.2V
  • Rechargeable: Yes, up to 500 cycles (Ni-MH)
  • Pack size: Pack of 4
  • Highest Eneloop capacity, ideal for power-hungry devices
The Panasonic Eneloop Pro AA are the high-capacity variant of the famous Eneloop line. With 2500 mAh (versus 1900 mAh for standard Eneloop), they are the brand's most enduring NiMH rechargeable cells, designed for power-hungry devices: camera flashes, game controllers, toys, powerful lights. Shipped pre-charged and ready to use, they keep up to 85% of their capacity after a year of storage. In return for that capacity, they handle fewer cycles than standard Eneloop (about 500 versus 2100). Sold in packs of 4.
We keep a set of Eneloop Pro AA in the camera bag, and that is really where they shine. On a speedlight flash, the capacity difference against standard Eneloop shows: recycle time stays fast for longer, and you get more shots before needing a recharge. Same story on a heavily used game controller or a demanding light, where the 2500 mAh give plenty of headroom. They arrive charged, ready to use, and hold their charge well from one session to the next. The trade-off to know is their longevity: the Pro version handles fewer cycles than the standard Eneloop (about 500 versus 2100) and self-discharges a little faster at rest. In other words, for everyday use in low-drain devices (remotes, mice), standard Eneloop remain more relevant and more durable. But as soon as a device demands a lot of energy, the Pro clearly make the difference. An excellent buy for anyone who shoots with flash or games a lot.
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III - 18650 and 21700 batteries

Popularised by electronic cigarettes and flashlights, 18650 batteries have made a name for themselves and become the reference format for powerful rechargeable batteries, as their size-to-capacity ratio is so excellent. Here are the best 18650 and 21700 batteries on the market:

NCR18650B 3400mAh Panasonic NCR18650B 3400 mAh 18650 battery
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Panasonic NCR18650B 3400mAh

23.79€ (273)

The undisputed benchmark of 18650 batteries: 3400 mAh of capacity, flawless Japanese quality and reliability that make it the basis of many battery packs.

  • Capacity / Voltage: 3400 mAh / 3.6V-3.7V
  • Rechargeable: Yes, Lithium-ion (Flat Top)
  • Pack size: Pack of 4
  • The 18650 benchmark, high capacity and reliability
The Panasonic NCR18650B is the benchmark lithium-ion cell in the 18650 format. With 3400 mAh, a nominal voltage of 3.6 to 3.7V and proven reliability, it is one of the highest-capacity and most sought-after cells of this format. We offer it here in an unprotected Flat Top version (65 x 18 mm), the most compatible with torches and devices. It also serves as the basis for many packs, power banks and e-bikes. Beware of the many counterfeits online: the ones offered here are 100% genuine.
In the 18650 world, the NCR18650B is the yardstick, and for good reasons. We used it in high-end torches and to rebuild a small pack, and every time the rated capacity is there: 3400 mAh is among the best in a cell of this format, with runtime that is clearly noticeable against low-end 18650s. Consistency is the other strength: from one cell to the next, performance is steady, which matters when you assemble several in series or parallel. We chose the unprotected Flat Top version, more compact and accepted by more devices, but that is a point to check: some lights require a protected cell (Button Top), slightly longer. Another warning, and not a minor one: counterfeits abound online for this format, often recycled cells sold above their real capacity, hence the importance of a serious source. Finally, like any bare lithium cell, it requires a suitable charger and careful handling. For anyone who knows what they are doing, it is simply the best 18650 basis on the market.
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Fenix ARB-L18-3500U

34.00€ (70)

A premium 18650 battery that recharges directly via a built-in micro-USB port, with no external charger: 3500 mAh, an LED indicator and multiple protections.

  • Capacity / Voltage: 3500 mAh / 3.6V
  • Rechargeable: Yes, via built-in micro-USB (Lithium)
  • Pack size: Sold individually
  • Direct USB charging, LED indicator, multiple protections
Fenix, famous for its ultra-powerful torches, offers here an innovative 18650 battery. Its unique feature: a built-in micro-USB port that lets you recharge it anywhere, from a computer, a phone charger or a power bank, with no dedicated charger. With a 3500 mAh capacity, an LED charge indicator and multiple protections (short circuit, overcharge, overheating, deep discharge), it is one of the most reliable 18650 cells on the market. Note: its 70 mm length, slightly longer than standard.
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Samsung 50E 21700 (5000mAh)

13.90€

The benchmark high-capacity 21700 cell: the Samsung 50E offers 5000mAh in a compact format, ideal for powerful torches, scooters and DIY batteries.

  • Format: 21700 (INR21700-50E)
  • Capacity: 5000 mAh
  • Continuous discharge: About 9.8A
  • Nominal voltage: 3.6V (lithium-ion)
  • 5000mAh, the best capacity/price ratio in 21700
The Samsung 50E cell (INR21700-50E) is a rechargeable lithium-ion cell in the 21700 format, renowned for its excellent capacity/price ratio. With its 5000mAh and a continuous discharge current of about 9.8A, it offers a very good balance between runtime and power. It is used in powerful torches, electric scooters and bikes, DIY battery packs and electronic mods. This is a bare, unprotected cell, reserved for experienced users.
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Keeppower 18650 3500mAh

17.19€ (130)

One of the highest-capacity 18650 cells on the market: the Keeppower 3500mAh packs a premium cell and a built-in protection circuit for flashlights and demanding devices.

  • Capacity: 3500 mAh (min. 3350 mAh)
  • Protection: Built-in circuit (PCB)
  • Discharge: Up to 8A continuous
  • Cycles: Over 500
  • High capacity with reliable built-in protection
The Keeppower 18650 3500mAh is a premium rechargeable lithium-ion cell, popular with fans of powerful flashlights and electronics. It uses a quality cell (Panasonic/Sanyo type) offering high real capacity (3350 mAh minimum, 3500 mAh typical) and a built-in protection circuit against overcharge, deep discharge, over-current and short-circuit. With a 3.7V nominal voltage, continuous discharge up to 8A and over 500 cycles, it is a safe bet for anyone wanting reliability and runtime. A niche brand, it is mainly found at specialist retailers.
The Keeppower 18650 3500mAh is a cell you often see recommended on flashlight forums, and for good reasons. Its reputation rests on the quality of the cell used (a Panasonic/Sanyo NCR18650GA type base) combined with a carefully made protection circuit. In practice, the real capacity delivers: independent tests confirm a little over 3350 mAh, placing this cell among the highest-capacity 18650s. The built-in protection is reassuring for daily use: it cuts off on short-circuit, overcharge or over-deep discharge, protecting both the cell and the device. In use, it powers a hungry flashlight through long sessions without flinching. Two things to know: at very high current (close to 7-8A continuous), the protection can trip before the cell is fully drained, and above all, it is a niche brand, hard to find in mainstream retail in France, where you have to go through specialist retailers. But for quality and runtime, it is a reference.
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Astrolux E1825 18650 (2500mAh)

16.56€ (17)

Two high-drain 18650 cells: the Astrolux E1825 deliver 2500 mAh and up to 18 A, ideal for powerful flashlights and vaping.

  • Capacity: 2500 mAh (per cell)
  • Discharge: 18 A continuous (high drain)
  • Format: 18650, button top, unprotected
  • Pack: Sold in twos
  • 18 A high drain for flashlights and vaping
The Astrolux E1825 are 2500 mAh rechargeable 18650 cells built for high drain: up to 18 A continuous, enough to power high-output flashlights, rebuildable vaping gear, RC toys or tools. Unprotected and with a button top, they are compatible with the vast majority of demanding devices. Sold in a two-pack, they offer good value for renewing or expanding a set of 18650 cells.
The Astrolux E1825 are unpretentious but effective and affordable high-drain 18650 cells. Their appeal: 18 A continuous current for 2500 mAh, a classic, well-calibrated compromise for powerful flashlights and rebuildable vaping, where a high-capacity but low-drain cell would sag. In our use, they hold their current claims, with real capacity close to the rating, honest for the price. The button top improves compatibility with devices that will not take flat tops. Two points to watch, common to this type of cell: they are unprotected, so reserved for devices that handle cut-off themselves, and must be charged on a dedicated charger that monitors voltage. To renew a set of 18650 cells without breaking the bank, the two-pack is a good deal.
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IV - CR123A and 16340 batteries

Long used in cameras, the CR123A battery has become very popular and now powers many devices and flashlights in particular. Called RCR123 if rechargeable, this battery, in 16340 format, is durable and practical. Here is our choice of CR123:

Duracell CR123

9.99€ (77)

A compact, enduring 3V lithium battery, resistant to extreme temperatures and storable for 10 years, ideal for tactical lights, alarms, sensors and cameras.

  • Voltage / Chemistry: 3.0V, lithium
  • Rechargeable: No (single-use)
  • Pack size: Pack of 2
  • Cold-resistant, 10-year storage, high density
The CR123A battery (also called CR17345) is a high-performance 3V lithium battery, very compact and known for its resistance to extreme temperatures, from severe cold to high heat. From Duracell, this single-use battery is ideal for demanding and security devices: tactical torches, alarms and detectors, surveillance cameras, rangefinders, sensors and cameras. Thanks to Duralock technology, Duracell guarantees storage for up to 10 years. Sold in a pack of 2.
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V - Button cells

Button cells or flat batteries are no longer limited to their role as watch batteries. Widely used, especially in car key fobs or calculators, they come in various formats, including the famous CR2032 and LR44. We have chosen these for you:

Energizer CR2032 Button Cell Batteries (x6)

4.10€ (291)

The most common button cell in the world: 3V lithium, found in watches, remotes, scales, sensors and on computer motherboards. Pack of 6.

  • Voltage: 3V (lithium)
  • Equivalence: CR2032 / DL2032 / BR2032 / SB-T15
  • Pack size: Pack of 6
  • The button cell standard, Energizer quality
The CR2032 is the most widespread 3V lithium button cell. Compact (20 mm diameter, 3.2 mm thick), it is everywhere: watches, calculators, car keys and remotes, scales, thermometers, toys, sensors, trackers and above all as the CMOS battery of computer motherboards. From Energizer, an industry benchmark, it is sold here in a pack of 6, ready to use and with a long shelf life.
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Duracell CR2025 batteries (x4)

5.80€ (26496)

The coin cell for car keys and watches: the Duracell CR2025 lithium 3V offers long life and child safety, in a pack of 4 ready to help out.

  • Voltage: 3V (lithium)
  • Equivalence: CR2025 / DL2025 / BR2025
  • Pack: Pack of 4
  • Safety: Child technology (Bitrex bitter taste)
  • The 3V coin cell for car keys and watches
CR2025 cells are 3-volt lithium coin cells, very common in small everyday devices. You find them in car keys (remotes), watches, calculators, scales, laser pointers and electronic boards. Thin and wide (20 mm diameter, 2.5 mm thick), the Duracell CR2025 matches the references DL2025 and BR2025. Sold in packs of 4, it offers long storage life and child-safety technology (Bitrex bitter taste) reducing ingestion risks.
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Duracell LR44 Batteries (x4)

6.54€ (26100)

The LR44 is one of the most widely used alkaline button cells in the world, in watches, calculators, toys and small remotes. Here is a pack of 4 Duracell cells.

  • Voltage: 1.5V (alkaline)
  • Equivalence: LR44 / AG13 / A76 / 76A / V13GA
  • Pack size: Pack of 4
  • The button cell standard, Duracell reliability
LR44 cells are among the most common alkaline button cells in the world. You find them in watches, calculators, toys, laser pointers, thermometers, digital calipers and small remotes. Very compact (11.6 mm diameter, 5.4 mm thick), this 1.5V alkaline cell from Duracell is equivalent to AG13, A76, 76A or V13GA references. Sold in a pack of 4, it offers the brand's recognised reliability.
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Duracell CR2016 batteries (x4)

6.29€ (8255)

The thinnest coin cell in its family: the Duracell CR2016 lithium 3V powers keys, watches and remotes, in a pack of 4 with child safety.

  • Voltage: 3V (lithium)
  • Equivalence: CR2016 / DL2016
  • Pack: Pack of 4
  • Safety: Child technology (Bitrex bitter taste)
  • The thinnest 3V coin cell, for keys and watches
CR2016 cells are 3-volt lithium coin cells, the thinnest in the CR20xx family. You find them in car keys, watches, remotes, electronic boards, calculators and small gadgets. With a 20 mm diameter and only 1.6 mm thick, the Duracell CR2016 matches the reference DL2016. Sold in packs of 4, it offers long storage and child-safety technology (Bitrex bitter taste) reducing ingestion risks.
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VI - Other batteries

CR2, A23, LR20, LR14? Alkaline, saline? Ni-MH, Lithium? 1.5V, 3V, 9V? Rechargeable, dry?
The choice in terms of batteries on the market is huge, and it is sometimes difficult to find your way around. Here is a sample of some excellent batteries that do not fit into any of the other sub-sections...

Duracell CR2 Batteries (x2)

8.80€ (18300)

A compact, enduring 3V lithium battery known for its high power, ideal for cameras, smoke detectors, lights and sensors, and storable for 10 years.

  • Voltage / Chemistry: 3.0V, lithium
  • Rechargeable: No (single-use)
  • Pack size: Pack of 2
  • High power, 10-year storage, cold-resistant
The CR2 battery (also called CR15H270) is a very popular 3V lithium battery, valued for its high energy density in a compact format. From Duracell, it is ideal for film and instant cameras, smoke detectors, torches, wireless locks and sensors, and golf rangefinders. Thanks to Duralock technology, Duracell guarantees storage for up to 10 years. Sold in a pack of 2.
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Duracell LR20 / D batteries (x4)

6.29€ (21767)

The largest of the cylindrical batteries: the Duracell Plus LR20 (D size) gives maximum runtime to powerful torches, site radios and big toys.

  • Voltage: 1.5V (alkaline)
  • Format: LR20 / D / MN1300
  • Pack: Pack of 4
  • Storage: Up to 10 years (Duralock)
  • The high-runtime D battery for power-hungry devices
Duracell Plus LR20 (D size) batteries are 1.5-volt alkaline batteries in the largest common cylindrical format. Their large volume gives them high capacity, ideal for very power-hungry devices: big torches, lanterns and floodlights, site radios, bulky toys, door chimes and some household devices. Sold in packs of 4, they offer up to 50% more runtime than the standard, with up to 10 years storage thanks to Duralock technology.
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Duracell LR14 / C batteries (x4)

8.90€ (18503)

The big cylindrical battery for power-hungry devices: the Duracell Plus LR14 (C size) powers torches, radios and toys with great runtime and up to 10 years storage.

  • Voltage: 1.5V (alkaline)
  • Format: LR14 / C / MN1400
  • Pack: Pack of 4
  • Storage: Up to 10 years (Duralock)
  • The long-lasting C battery for torches and radios
Duracell Plus LR14 (C size) batteries are 1.5-volt alkaline batteries in the medium cylindrical format, midway between AA and the large D. You find them in torches, portable radios, bulky toys, electronic musical instruments and various power-hungry devices. Sold in packs of 4, they offer up to 50% more runtime than the standard, and use Duralock technology that preserves their charge for up to 10 years in the packaging.
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Duracell MN21 (A23) Batteries (x2)

3.00€ (3000)

Need an A23 battery? Here is a pack of 2 Duracell MN21 cells, a very compact 12V alkaline battery, perfect for gate remotes, doorbells and car keys.

  • Capacity / Voltage: ≈ 55 mAh / 12V
  • Rechargeable: No (alkaline)
  • Pack size: Pack of 2
  • 12V in a miniature format, reliable and long shelf life
Did you know an A23 battery is actually made of 8 micro-cells stacked in a single casing? Called A23 by Energizer and MN21 by Duracell, it is a particularly compact 12 volt alkaline cell (28.5 mm long, 10.3 mm diameter). You find it in gate and garage remotes, car keys, wireless doorbells, alarm and keyless entry systems. Sold in a pack of 2, it offers Duracell reliability.
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Duracell 9V batteries (x4)

13.09€ (242)

The battery that guards your safety: the Duracell Plus 9V powers your smoke detectors, multimeters and instruments, with brand reliability and up to 5 years storage.

  • Voltage: 9V (alkaline)
  • Format: 6LR61 / MN1604 (9V block)
  • Pack: Pack of 4
  • Storage: Up to 5 years (Duralock)
  • The benchmark 9V for smoke detectors and instruments
Duracell Plus 9V batteries are 9-volt alkaline batteries in the block format (6LR61 / MN1604), one of the most used for devices needing a high voltage in a small case. You find them in smoke detectors, multimeters, remotes, wireless microphones, measuring instruments and toys. Sold in packs of 4, they use Duralock technology that preserves their charge for up to 5 years in the packaging, plus Duracell's recognized reliability.
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VII - Related questions

How do you choose rechargeable batteries? Available in several formats (LR6, LR14…), they fall into 2 categories, namely Nickel Cadmium (NiCd) and Nickel Metal Hydride (NiMH). NiMH batteries offer the advantage of being less toxic and having a longer battery life. Also check, when possible, the battery capacity (in mAh), which gives an idea of how long it will last.

The empirical way is to place the battery upright on a flat surface, like a table, then lift it a few centimetres and release it, to see if it bounces or not. Lighter, empty batteries will bounce where full ones will behave differently. However, there is a more scientific way to do this, which we recommend: using a battery tester.

Depending on the type of batteries you have, their charging time will vary. Overall, the more powerful a battery is, the longer it will take to fully recharge. Thus, for 4 standard 1.5-volt batteries, full charging can take up to 6 hours. Or half the time if you only charge 2, for example. Some chargers are faster, but quality batteries will be needed to avoid affecting their lifespan.

Where an AA alkaline battery is 1.5V, a rechargeable AA will be 1.2V. Electronic devices are tolerant at this level, often able to handle voltages of 0.9V. Alkaline batteries discharge in a constant, linear manner, whereas rechargeable cells keep their voltage for several hours before dropping rapidly at the end of discharge. Although different, therefore, 1.5V batteries and 1.2V rechargeable batteries are equivalent in use.