Compatibility Model :Compatible with Charge 6 speakers,Replacement Battery Part No.: I0328A Product Specifications:Voltage:7.2 V, Capacity:4722mAh / 34.00 Wh,.Size:71.60 x 38.45 x 20.00mm Important Attention:It is recommended to fully drain and fully charge the battery, especially during the first 3 charging and discharging cycles. Doing so may greatly improve the overall life of the battery Superior quality:Built-in overcurrent, overcharge, overvoltage, overheat and short circuit protection circuit allows you to charge without worry Tips:Please ensure both model and battery part number are matched with your device.If you are not sure, please send email to us with your battery details or pictures, we will give you professional suggestions Compatible Battery Part Number: I0328A   Specifications: Voltage：7.2V Rate：34.00Wh Capacity：4722mAh Net Weight:100.0g / 3.53oz Size：71.60 x 38.45 x 20.00mm   Tips Before Purchase Please check the compatible model and the original battery number before purchasing.