510 Threaded Or 808D USB Electronic Battery USB Thread Cable Smart Wireless USB Charger Rechargeable Overcharge Protection for Adapter Devices with LED Indicators
Note: Battery Capacity: 400mAh , if need other bigger capacity, please talk to us online
Work Voltage: 3.2V-4.2V ON/OFF Work: in two seconds press continously three times Work Status: Press Switch to Keep Work Off Work : Less than 3.2V, can't work Need to Recharge: LED Flash 10 Times Short-circult Protection: Press Switch, LED Flash Three Times