7,000mAh7.4mm thickAround $1000/£800/AU$1345The Gionee M2017 doesn’t just have one battery... it has two. But each of them is 3500mAh, which is already larger than most smartphone batteries, and together they give you 7000mAh of juice to sip. Why it has two big batteries rather than one enormous one isn't clear, since they're not removable and the...