The battery only is an accessory, because the all battery is same your device, otherwise your device is non-removable .This accessory has a clear advantage, if your device can change the battery, you can bring several batteries and go to work shop and you not concern the issue at all.
The battery accessories have UC-BS55, UC-BE55, and UC-B12. UC-BS55 used with UW20 and UW55, it named standard battery. UC-BE55 used with UW20 and UW55, it named extended battery. UC-B12 used with UA12, it named battery. The battery accessory features are easy installation, water proof and intelligent power indicator.
All device can use two battery once time, and the battery can be used with charger, it will save more time for users. The users can complete the charger work of battery. Or the users can add one battery charger. When they finish their work and find the place which can charger, the battery that is dead. The battery will make the data is continuous and validity .