Specification: Voltage:7.4 V; Type:Li-ion; Capacity:2300 mAh/17.02 Wh; Size:118.70 x 55.00 x 40.30 mm; Weight:153 g
Quality Certification: ROSH, CE and UL triple certification. No memory effect, over-charge, over-discharge, over-heat, over-current and short-circuit protection
If your wireless device's cruising time is significantly reduced, you should replace the battery.