One of the big selling points to the Umi Touch is its huge battery capacity. According to the Umi website, the battery in this smartphone is a 4,000 mAh Sony lithium-polymer cell, which is sealed behind the back cover. At 15.2 Wh, this is a much larger capacity than most smartphones on the market, which typically sit in the 10.5 to 12.5 Wh range.
The Umi Touch delivers great battery life in most of our tests, sitting towards the top of our charts across the board. The large battery does take a while to charge, and there doesn't appear to be any quick charging mechanism, but it's clear Umi wanted for focus on battery life first and foremost with the Touch. In that respect, the Touch delivers.
There are some things to note, though. Despite a massive battery, efficiency isn't great, as seen by the Samsung Galaxy S7 Edge - a 5.5-inch device with a 3,600 mAh battery - outlasting the Touch by nearly an hour in most tests. With further optimization, I'd hope that the Umi Touch's battery life could be improved.