Several contributing factors can cause your battery to rapidly drain on an Android smartphone. Bright OLED screens, slimmed-down form factors, a faster processor, and software that lies doormat in the background, all can take a significant toll on the phone's battery. Not surprising to find many smartphone users bring along all sorts of accessories to preserve or boost battery power. Just so you know, the charging cable, external battery brick, and charging case is currently packed away in a knapsack
