If it wasn’t for the working time and the charging capacity, the External laptop battery could well impress people with the feature of charging multiple devices in one go. A lot of External laptop battery brands produced by top OEM companies have this feature – They allow you to charge multiple devices like your cell phone or MP3 player. Imagine you having a device that not only allows you to charge your laptop, but also serves your mobile phone and MP3 player. How cool of the device, but most importantly, how efficient of the device would that be? To find out what other devices can be charged go to External Laptop Battery Review.