Insufficient funds ibuprofen 400 nebenwirkungen erfahrungen Bare nekkid, without its keyboard, the Lumia 2520 is a pretty slimline and robust tablet, as these things go, which means that while it's larger than the iPad 4, it's actually lighter. Considering battery life is 11 hours (plus four from the keyboard's battery), this is quite competitive. The robust polycarb shell has been scaled up. Slightly surprisingly, the 2520 uses its own proprietary charging port rather than USB - presumably to achieve the very rapid charging time (50 per cent of the monster battery gets filled in 45 minutes).