Specification: Voltage:25.2 V; Type:Li-ion; Capacity:2000 mAh/50.4 Wh; Size:138.15 x 70.00 x 22.00mm; Weight: 340 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.