Specification:Voltage: 7.4 V; Type:Li-ion; Capacity: 2900mAh , 21.46 Wh; Size: 113.80 x 62.00 x 40.00mm
If the battery life of your wireless device is significantly reduced, you should replace the battery
Quality certification: ROSH, CE, UL triple certification, no memory effect, overcharge, over discharge, overheating, over current, short circuit protection