Smartphone batteries

Replacing a battery costs ten times less than replacing a phone, and gives a three-year-old handset the endurance it had when new.

A lithium battery loses around 20 per cent of its capacity after 500 full cycles, roughly two years of normal use. Past that point endurance collapses and the phone may shut down abruptly at an indicated 20 per cent. Replacement is the most cost-effective repair there is. The things to watch are the claimed capacity, often inflated on generic packs, the presence of a compliant protection circuit, and exact compatibility with the handset reference, since one commercial model may carry two different batteries depending on the year of manufacture.

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iPhone 11 battery kit SiGN iPhone 11 battery kit
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SiGN iPhone 11 battery kit

28.99€ (25)

Replacement battery for the iPhone 11. Restore your device's original runtime when the battery gets tired.

  • Capacity: 3110 mAh
  • Compatibility: iPhone 11
  • Type: Lithium-ion
  • Use: Kit with fitting tools
  • Original runtime restored, iPhone 11
This replacement battery compatible with the iPhone 11 lets you restore your device's original runtime when the fitted battery weakens. Supplied as a kit with the removal tools needed for an easy replacement. Capacity of 3110 mAh. Check your original battery reference and the exact model of your device before buying to ensure compatibility.
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Galaxy S22 battery Samsung Galaxy S22 battery
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Samsung Galaxy S22 battery

29.50€ (11)

Replacement battery for the Samsung Galaxy S22 (S901B). Restore your device's original runtime when the battery gets tired.

  • Capacity: 3700 mAh
  • Compatibility: Galaxy S22
  • Type: Lithium-ion
  • Use: Replacement battery
  • Original runtime restored, Galaxy S22
This replacement battery compatible with the Samsung Galaxy S22 (S901B) lets you restore your device's original runtime when the fitted battery weakens. Capacity of 3700 mAh. Check your original battery reference and the exact model of your device before buying to ensure compatibility.
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iPhone 12 battery kit SiGN iPhone 12 battery kit
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SiGN iPhone 12 battery kit

24.99€ (7)

Replacement battery for the iPhone 12 and 12 Pro. Restore your device's original runtime when the battery gets tired.

  • Capacity: 2815 mAh
  • Compatibility: iPhone 12
  • Type: Lithium-ion
  • Use: Kit with fitting tools
  • Original runtime restored, iPhone 12
This replacement battery compatible with the iPhone 12 and 12 Pro lets you restore your device's original runtime when the fitted battery weakens. Supplied as a kit with the removal tools needed for an easy replacement. Capacity of 2815 mAh. Check your original battery reference and the exact model of your device before buying to ensure compatibility.
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Galaxy S24 battery Samsung Galaxy S24 EB-BS921ABY 4000 mAh battery
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Samsung Galaxy S24 battery

19.99€ (6)

Your Galaxy S24 drains too fast? A new EB-BS921ABY 4000 mAh battery restores its full runtime, easy to fit yourself at a low price.

  • Compatibility: Samsung Galaxy S24 (SM-S921B)
  • Reference: EB-BS921ABY
  • Capacity: 4000 mAh
  • Supplied with: New battery + tools
  • Restores the Galaxy S24's original runtime
This replacement battery for Samsung Galaxy S24 (reference EB-BS921ABY) has a 4000 mAh capacity, identical to the original. It restores your smartphone's fresh runtime when the battery tires after many charge cycles. Supplied new, often with removal tools, it can be fitted yourself or by a repairer. An affordable, eco-friendly way to extend your Galaxy S24's life.
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Galaxy S21 battery Samsung Galaxy S21 battery
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Samsung Galaxy S21 battery

29.50€ (4)

Replacement battery for the Samsung Galaxy S21 (G991B). Restore your device's original runtime when the battery gets tired.

  • Capacity: 4000 mAh
  • Compatibility: Galaxy S21
  • Type: Lithium-ion
  • Use: Replacement battery
  • Original runtime restored, Galaxy S21
This replacement battery compatible with the Samsung Galaxy S21 (G991B) lets you restore your device's original runtime when the fitted battery weakens. Capacity of 4000 mAh. Check your original battery reference and the exact model of your device before buying to ensure compatibility.
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See the Samsung Galaxy S21 battery offer at Samsung
iPhone 14 battery kit SiGN iPhone 14 battery kit
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SiGN iPhone 14 battery kit

30.99€ (4)

Replacement battery for the iPhone 14. Restore your device's original runtime when the battery gets tired.

  • Capacity: 3279 mAh
  • Compatibility: iPhone 14
  • Type: Lithium-ion
  • Use: Kit with fitting tools
  • Original runtime restored, iPhone 14
This replacement battery compatible with the iPhone 14 lets you restore your device's original runtime when the fitted battery weakens. Supplied as a kit with the removal tools needed for an easy replacement. Capacity of 3279 mAh. Check your original battery reference and the exact model of your device before buying to ensure compatibility.
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iPhone 15 battery iPhone 15 replacement battery 3349 mAh
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Apple iPhone 15 battery

28.91€ (4)

Your iPhone 15 no longer lasts the day? A new 3349 mAh battery restores its original runtime, easy to fit yourself at a low price.

  • Compatibility: Apple iPhone 15
  • Capacity: 3349 mAh
  • Type: Lithium-ion (replacement)
  • Supplied with: New battery + tools
  • Restores the iPhone 15's original runtime
This replacement battery for iPhone 15 offers a 3349 mAh capacity, identical to the original, to restore your smartphone's fresh runtime. It is ideal when the battery ages (dropping runtime, unexpected shutdowns, low battery health in settings). Supplied new, often with removal tools, it can be fitted yourself or by a repairer. An affordable, eco-friendly way to extend your iPhone 15's life rather than replacing it.
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Galaxy S25 battery Samsung Galaxy S25 EB-BS931ABY battery
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Samsung Galaxy S25 battery

17.84€

Restore your Galaxy S25's full runtime: a new EB-BS931ABY 4000 mAh battery, easy to fit yourself to extend your smartphone's life.

  • Compatibility: Samsung Galaxy S25 (SM-S931B)
  • Reference: EB-BS931ABY
  • Capacity: 4000 mAh
  • Supplied with: New battery + tool kit
  • Restores the Galaxy S25's original runtime
This replacement battery for Samsung Galaxy S25 (reference EB-BS931ABY) has a 4000 mAh capacity, identical to the original. It restores your smartphone's fresh runtime when the battery tires over time. Supplied new, usually with a removal tool kit, it can be fitted yourself following a tutorial or by a repairer. An affordable, eco-friendly alternative to replacing the whole Galaxy S25.
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See the Samsung Galaxy S25 battery offer at Samsung
iPhone 13 battery kit SiGN iPhone 13 battery kit
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SiGN iPhone 13 battery kit

29.99€

Replacement battery for the iPhone 13. Restore your device's original runtime when the battery gets tired.

  • Capacity: 3227 mAh
  • Compatibility: iPhone 13
  • Type: Lithium-ion
  • Use: Kit with fitting tools
  • Original runtime restored, iPhone 13
This replacement battery compatible with the iPhone 13 lets you restore your device's original runtime when the fitted battery weakens. Supplied as a kit with the removal tools needed for an easy replacement. Capacity of 3227 mAh. Check your original battery reference and the exact model of your device before buying to ensure compatibility.
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See the SiGN iPhone 13 battery kit offer at Apple
iPhone 16 battery iPhone 16 replacement battery 3561 mAh
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Apple iPhone 16 battery

19.99€

Restore your iPhone 16's full runtime: a new 3561 mAh battery, easy to fit yourself to extend your smartphone's life at a low price.

  • Compatibility: Apple iPhone 16
  • Capacity: 3561 mAh
  • Type: Lithium-ion (replacement)
  • Supplied with: New battery + tools
  • Restores the iPhone 16's original runtime
This replacement battery for iPhone 16 has a 3561 mAh capacity, identical to the original, to restore your smartphone's fresh runtime. It is the solution when the battery tires after a few years of use. Supplied new, usually with removal tools, it can be fitted yourself following a tutorial or by a repairer. An affordable, eco-friendly alternative to replacing the whole iPhone 16.
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See the Apple iPhone 16 battery offer at Apple

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Related questions

The part number is printed on the battery itself, as a code such as EB-BG991ABY or A2863. On a glued-back model, look instead for the phone's model number in Settings, under Information. Never rely on the marketing name alone: the same model can carry several part numbers depending on the region.

An original battery guarantees the stated capacity and full dialogue with the system, notably the battery health readout on iPhone. A good compatible costs 40 to 60 per cent less but often shows 5 to 15 per cent less real capacity. The decisive criterion remains a certified protection circuit.

One full cycle, from 100 per cent down to shutdown then a recharge in one go, helps the system reset its gauge. It is not a chemical necessity but a software recalibration. Repeat it every two or three months if the percentage indicator turns erratic, with sudden drops from 40 to 10 per cent.

Beyond wear, three culprits keep coming back: automatic brightness switched off at a high level, apps refreshing in the background, and a constant network search in a poorly covered area. Check battery health in the settings first: below 80 per cent, the battery really is what needs replacing.

Between 500 and 800 full cycles before dropping to 80 per cent of its initial capacity, so two to three years of daily use. Heat is the main accelerator: a phone left on a dashboard in high summer ages more in one week than in six months of normal use.

No, that habit dates from NiCd cells and their memory effect. A modern lithium battery prefers partial charges and dislikes both zero and long spells at 100 per cent. Day to day the ideal is staying between 20 and 80 per cent, which most phones now offer to automate.