Do you normally leave your phone out in sub freezing temps? Cold environment may affect battery performance and make your Mobile discharge faster.
Many MobileÂ Manufacturers including Blackberry, Samsung, and Apple, prefer to use Lithium-ion polymer batteries because these batteries have a high power density that gives the user a long battery life. But as Cold temps slow down the chemistry in batteries, it reduces their capacity to make electricity.This means that the lower the temperature, the less power the battery can provide.
Li-Ion Polymer batteries have the best discharge capacity at around 20Â°-30Â° C, the capacity starting to drop off at a slower rate from 20Â° down to just below 0Â° C.