Specification: Voltage:3.7 V; Type: Li-ion; Capacity: 2200 mAh/8.14 Wh; Size:53.33 x 34.40 x 11.00mm
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.