Bundle: Olight Portable Universal Magnetic USB Charger (UC Charger/Cable Charger for Travelling) for 14500 16340 (RCR123A) 18500 18650 22650 Rechargeable Batteries with Olight Patch USB powered with a charging current of 750mA. Compatible with lithium batteries with a rated voltage between 3.6V and 3.7V. NiMH batteries Charging for dummies. There is no need for matching the polarities, as the charger can automatically recognize them when in use. All sizes compatible. It works perfectly on cylinder shaped batteries of variable diameters and lengths. COMPATIBLE BATTERY TYPES -10340 12340 14430 17670 20700 26650 14500 16500 (RCR123A) 18350 21700 AA 14650 16340 16650 18490 22500 AAA 10350 12500 17350 18500 22650 AAAA 10440 12650 17500 18650 25500 C 10500 14350 17650 18700 26500 Tangle-free flat cable design. Easy for storing and organizing. Ideal for travelling . You could charge the batteries anywhere anytime with the portable USB plug. *To prevent a short circuit, DO NOT charge batteries with a positive AND negative polarity on the same side. This includes Olight customized batteries built for magnetic charging.