Does your Android or iPhone's battery seem to hold less of a charge over time? Like all rechargeable batteries, Li-ion batteries (which are in most phones) become less effective as they age. Even though these. Charge your phone throughout the day.Your phone's battery has a fixed amount of charging cycles (the number of times you charge the battery from 0% to 100%). For example, if your. Exposure to very high or low temperatures drains the battery quickly.Batteries are made to work best at room temperature, which is about 68 °F (20 °C).Your battery, esp. Fast charging is convenient, but don't use it every time you charge your phone.Fast charging puts more stress on the battery than necessary, so battery performance can. To avoid parasitic load, don't play games or stream videos while charging your phone.Parasitic load is what happens while a battery is being drained during charging.