The UC (Universal Battery Charger) is a universal magnetic USB charger for all single cylinder rechargeable lithium or NiMH batteries of variable sizes. The charger is connected to the battery through the magnetic ends. It can recognize the battery polarities, with a maximum charging current reaching 750mA. This product has a simplified structure resembling that of an earphone. It also uses premium eco-friendly silicone material and tangle-free flat cable design making it easier for storing and carrying. UC is an excellent charging choice for outdoor use and traveling.