502030 Lithium polymer battery 250mAh Can be used for vehicle locator, High temperature polymer battery, high energy density lithium cobalt acid material, long cycle life, low internal resistance, large current, small size, large energy. Green environmental protection, no mercury, chromium, lead and other substances, through the detection certification

602030 Lithium battery 300 mA 3.7V live with cargo device battery Product features: Polymer battery, lithium cobalt acid high energy density material, long cycle life, low internal resistance, large current, small volume, large energy. Green environmental protection Does not contain mercury, chromium, lead and other substances, through testing certification