Caterpillar, famed for building solid and dependable machinery, has been in the mobile phone market for a number of years now, but their latest handset has a few REAL game changer features:

5,000mAh battery giving you 44 days of standby and 38 hours of talktime on a smartphone.  This battery is so powerful, it can be used to charge your OTHER devices that may not keep up the pace.

It is waterproof to 2m and can be dropped from a height of 1.8m so can stand solid usage.