Product Overview The 501145 is a 3.7V 220mAh rechargeable lithium-polymer pouch cell engineered by VATS Battery for reliable, long-lasting power in modern electronic devices. Built on a compact 4.7×11×45mm (T×W×L) footprint, it combines a stable 3.7V nominal voltage with a true 220mAh capacity, so portable devices run longer on a single charge without adding bulk. Manufactured by an ISO9001-certified lithium battery maker based in Guangdong, China, each cell is produced on