... deviceIndicator shows power status of external batteryExternal battery connects directly to deviceExternal battery charges through USB cable or Wall adapterConnector ... . 2-4 Hours Note: Do not charge external battery and device at the same timeBrand New, Retail PackagingCompatible ... 5800 XpressMusic, 6210 Navigator, 6350, 6555, 6790, 7230, 7705 Twist, E63, E66, E71, E71x, E72, N81, N810 Internet Tablet ...