Olight UC Magnetic USB Charger
(9 reviews)
Particularly clever, this small charger from Olight is able to recharge almost any cylindrical battery, via USB.
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Characteristics
- Charge: 750mA via USB
- Slot: Charges a single battery at a time
- Compatibility: Lithium IMR/Li-ion, Nickel (Ni-MH/Ni-Cd)
- Ultra compact, universal (charges more than 30 battery types)
Detailed overview: Olight UC Magnetic USB Charger
This minimalist battery charger was designed by Olight (a brand specializing in flashlights and torches). Powered via USB, it is able to charge a very wide range of different batteries and cells, as long as they are Lithium or NiMH/NiCD type and cylindrical in shape, with a current of 750mA.
Here is a non-exhaustive list of the batteries and cells the Olight UC (for Universal Charger) is able to charge: Lithium technology: 10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14350, 14430, 14500, 14650, 16500, 16340 (RCR123A), 16650, 17350, 17500, 17650, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650. NiMH/NiCD technology: AA, AAA, C, D, AAAA.
Shaped like a Y, it has a USB plug on one end, and on the other, 2 magnetic tips that attach to your battery's two poles thanks to two magnets. An LED indicator shows whether charging is in progress (red) or complete (green). Reliable, handy, and highly innovative, an ideal charger for anyone who needs versatility.
Full specifications
Detailed characteristics
Charging capacity
| Number of slots?Number of batteries that can be charged at the same time. | 1 |
|---|---|
| Compatible formats?Accepted battery formats (AA, AAA, 18650, 21700...). | AAAA, AAA, AA, C, 10440, 14500, 14650, 16340, 16650, 17500, 17650, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22650, 25500, 26650 |
| Compatible chemistries?Recognised battery chemistries (Li-ion, LiFePO4, NiMH, NiCd...). | Li-ion, NiMH |
| Max charging current?Maximum charging current per slot, in milliamps. | 750 mA |
| Adjustable charging current?The user can manually pick the charging current. | No |
Power input
| Power source?Built-in mains plug, USB port (Micro-USB or USB-C) or 12 V car socket. | USB-A cable/jack |
|---|
Output and features
| USB output (device charging)?The charger can also act as a power bank: it uses the inserted cells to charge another device. | No |
|---|
Display and diagnostics
| Display?Type of visual feedback on charging status. | LED per slot |
|---|---|
| Automatic chemistry detection?The charger automatically adapts its charging profile to the inserted cell, with no manual setting. | Yes |
Size
| Weight?Weight of the empty charger, in grams. | 0.7 oz (20.5 g) |
|---|
Warranty
| Warranty?Length of the manufacturer's warranty. | 5 years |
|---|
Our tester's review: Christophe Delpuech
Since the launch of this small battery charger, several brands have released a magnetic charger with a similar design. We've had the chance to test 4 others, and none is as good and versatile as the one from Olight. Nothing beats the original, then. Able to charge almost any cylindrical battery, this smart charger detects the battery's technology and charges it accordingly. Basically, it can charge any cylindrical lithium battery with a voltage of 3.6V/3.7V and any cylindrical NiMh cell with a voltage of 1.2V/1.5V. It's hard to get more versatile than this tiny device, which will find its place anywhere thanks to its feather-light weight of 20.5g, for example in an EDC kit or a Bug Out Bag. One of the best chargers on the market, and one of the Best Batteries team's favorites! (Would have scored 5/5 if several colors had been offered.)
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Published on 02/09/2026