... .li polymer battery 3.7v 500mAh 2.flexible size 3.customer design 4.battery factory 5.pass Rohs,CE,UN38.3,MSDS ... , EVs, Electronic tools, Toys, back-up power, emergency power portable mobile power, medical equipment, heating equipment, health care equipment, defend electronic ... .5150.5±0.5133. 3.7v 5000mah LiMnO2 rechargeable battery( customer design)