This smartphone can last fifteen days on a single charge

Battery cases — “smart” or not — are for suckers and only highlight a modern smartphone’s inability to last through an entire day without needing to be recharged. Until we get a real battery breakthrough, cramming a bigger battery into a phone is the next best thing. That’s exactly what the Oukitel K10000 phone packs. Whereas most smartphone batteries store between 1,500-3,000 milliamp-hours (mAh), the K10000 has a 10,000 mAh battery — good for 10 to 15 days according to a report from The Techolic. The K10000’s big battery is also good for charging other devices. That’s right, it works like a battery pack and can recharge an iPhone 6S Plus up to three times. Other than the unusually large battery, the K10000 is a pretty average smartphone running Android 5.1 Lollipop. It has a 5.5-inch screen with 720p resolution (1,280 x 720), a 1GHz quad-core processor, 2GB of RAM and 16GB of internal storage (expandable via microSD card). It also supports dual SIM cards. On the back is an 8-megapixel camera with LED flash, and the front camera is 2 megapixels. Nothing special.