Olight UC Magnetic USB Charger: our full review

Two magnetic Y-shaped tips, 20.5g on the scale, and compatibility spanning over 30 battery and cell formats: the Olight UC bets everything on pocket-sized versatility, at the cost of a fixed 750mA current and one cell at a time.

Our rating
4.1/5
Safety and protections: 4.0 out of 5 (weighting 20%)Safety4.0Build and endurance: 4.8 out of 5 (weighting 15%)Build4.8Format and chemistry compatibility: 4.7 out of 5 (weighting 25%)Compatibility4.7Charging precision: 3.4 out of 5 (weighting 25%)Precision3.4Display and control: 3.6 out of 5 (weighting 15%)Display3.6

How is this rating calculated?

Olight UC magnetic charger with its Y-shaped tips

The essentials

The Olight UC rests on a simple, effective idea: two magnetic Y-shaped tips that attach directly to the two poles of a cylindrical battery or cell, with no bay to fit. The result is exceptional compatibility, over 30 Li-ion and NiMH/NiCd formats, in a 20.5g body that slips into any kit bag. Its simplicity is a deliberate choice rather than a shortfall: a fixed 750mA current, one battery at a time, and a red/green LED that gives the essential information without fuss. The 5-year manufacturer warranty, the longest observed in this category, reflects a build made to last. As a universal backup charger to slip into a bag, it's hard to beat for versatility and ruggedness in this format.

Strengths

  • Exceptional compatibility: over 30 Li-ion and NiMH/NiCd formats via two universal magnetic tips
  • Ultra-compact, lightweight format (20.5g), easy to slip into a kit bag or EDC pouch
  • 5-year manufacturer warranty, the longest observed in the battery charger category, a mark of durable build quality
  • Automatic detection of the connected battery's chemistry and voltage
  • Simple USB power, usable with any adapter or power bank

Limitations

  • Fixed 750mA charging current, with no adjustment to speed up or slow down charging
  • Only one battery charged at a time, unlike multi-bay chargers
  • Correctly aligning the two tips on the right poles takes more attention than a fixed bay requires
  • Only one colour available
Olight UC Magnetic USB Charger: see the full details and price →

Two magnetic tips rather than a bay

Designed by Olight, a brand known for its flashlights, the UC (Universal Charger) starts from a different premise than standard chargers: rather than a rigid bay, two magnetic Y-shaped tips attach directly to the two poles of a cylindrical battery or cell. One side of the Y ends in a USB plug, the other in the two magnetic tips.

30+
Compatible battery formats
20.5 g
Weight
5 yrs
Manufacturer warranty

Compatibility that beats every bay-based charger

This is the UC's real selling point: on the lithium side, it covers everything from the tiny 10340 to the 26650, including the essential 14500, 16340 (RCR123A), 18350, 18490, 18650, 20700, and 21700. On the NiMH/NiCd side, it accepts AA, AAA, C, D, and AAAA. This versatility far exceeds that of fixed-bay chargers, which impose a precise diameter and length.

A fixed current and one battery at a time, by design

The trade-off for this versatility comes from a deliberately minimal design, not a cut-rate build: charging current is fixed at 750mA, with no adjustment to speed up a large cell or slow down a small one. A single indicator light shows charging (red) and then completion (green), an instant, unambiguous read where the UC was never meant to rival a screen-equipped charger on data richness, only to stay as simple and universal as possible.

Worth knowing: aligning the two tips on the right poles takes more attention than a standard fixed bay requires, a usage point worth knowing before buying.

A 5-year warranty that inspires confidence

The charger automatically detects the connected battery's chemistry and voltage to adapt its behaviour, a form of smart control that needs no manual input from the user. Its 5-year manufacturer warranty is the longest observed in the battery charger category in the catalogue, a strong signal of the brand's confidence in the unit's durability, consistent with a minimalist format built to take repeated use without faltering.

Who the UC is for

This charger suits anyone wanting an ultra-compact, universal backup to rescue a single battery or cell on the go, in a survival kit, a hiking bag, or a travel pouch, without chasing speed or precise tracking. To charge several cells at once or track their condition precisely, a bay-based charger like the Nitecore UM2 or the Xtar VC4SL remains preferable.

The rating in detail

Our rating
4.1/5
Actual charging current not measured
Battery compatibility not measured
Safety and protections 4.0
Build and endurance 4.8
Cables and connectors not measured
Actually delivered power not measured
Multi-port power sharing not measured
Protocol compatibility not measured
Size and technology not measured
Format and chemistry compatibility 4.7
Charging precision 3.4
Display and control 3.6
Olight UC Magnetic USB Charger: see the full details and price →

The product and its alternatives

Olight UC Magnetic USB Charger

Olight UC Magnetic USB Charger

See price (9)

Particularly clever, this small charger from Olight is able to recharge almost any cylindrical battery, via USB.

View product
Nitecore UM2 Charger

Nitecore UM2 Charger

£13.13 (9)

A compact two-bay charger with a large LCD screen: the Nitecore UM2 recharges over USB at up to 3A and shows voltage, current, capacity and health for each cell.

View product
Xtar VC4SL Charger

Xtar VC4SL Charger

£29.41 (10)

A four-bay charger with an LCD screen and USB-C: the Xtar VC4SL shows voltage, current, capacity and internal resistance, and charges at up to 3A on one bay.

View product

Frequently asked questions

Over 30 formats: on the lithium side from 10340 to 26650 (14500, 16340, 18650, 20700, 21700...), and on the NiMH/NiCd side AA, AAA, AAAA, C, and D. The charger automatically detects chemistry and voltage.

No, the UC only charges one battery at a time, its two magnetic tips attaching to the two poles of a single cell. To charge several cells simultaneously, a bay-based charger is needed.

No, the current is fixed at 750mA, with no adjustment possible. That's the trade-off of this ultra-compact, universal format.

A single indicator light shows progress: red while charging, green once complete. There's no screen or numeric data.