vhbw - the clever way High-quality and compatible interchangeable battery with high capacity for your wireless headset (all suitable models can be found below) The battery can be charged with the standard or a compatible charger Our batteries meet all operational safety-related requirements What are the advantages of Li-Polymer technology? Lithium-polymer batteries (also LiPoly or LiPo batteries are part of the family of Li-Ion batteries. They are characterized by low self-discharge, long durability and high capacity. Compared to other Li-Ion technologies, the energy content of Li-polymer batteries is slightly lower, but they are more resistant to overcharging. The polymer-based electrolytes enable a wide range of designs with a low total weight of the battery. LiPo batteries are used in particular in electric cars, in model making, in smartphones or notebooks. Scope of delivery: 1x battery Technical data: Technology: Li-Polymer Capacity: 550 mAh Voltage: 3.85 V Nominal energy: 2.12 Wh Dimensions (L x W x H): 2.7 x 2.5 x 0.7 cm Number of cells: 1 Weight: 8 g cable length: 2.4 cm Suitable for the following device models: Sony WH-XB910N, INZONE H9, WF1000XM4 CHARGING CASE, WH-CH720N To ensure compatibility, please check that your currently used battery is listed. Suitable for: Sony FT702028PSony 722428 vhbw - the clever way High quality spare parts and accessories. For a long service life of your electrical appliances.