Is that long enough of a battery life for you? I wish this was the new norm, rather than the obsession of making devices as thin as possible. Unfortunately, this phone is an import so it may be trickier someone in the States to get, but it’s an interesting glimpse of what a phone could pack if we thought less about its aesthetics: the K10000 has a 10,000mAh battery that could easily last over a week. How big would the blast be if the battery exploded, though? Chinese-based manufacturer Oukitel has announced the K10000 Pro smartphone. It's the successor to the K10000 released in 2015 and there's just one thing they have in common. A mammoth 10,000mAh battery that claims to last up to 15 days on a single charge. Oukitel says the huge battery takes three and a half hours to recharge thanks to flash charge technology in the supplied 12V/2A charger. We recently reported on the LG X Power2, which has a 4,500mAh battery that can last up to 26 hours. The K10000 Pro simply laughs in the face of it and its comparatively puny battery life.