How High Should You Charge Your Smartphone? Expert Advice

When it comes to charging smartphones, several common recommendations are often given. One such suggestion is to charge your phone only up to 80% rather than to 100% to prolong battery life and avoid frequent replacements. This advice aims to extend battery lifespan, ensuring the device remains usable for longer without needing replacement. Battery health, which indicates the capacity to hold a charge, is key to maintaining optimal performance. However, this is not the only recommendation. While smartphones are designed to be charged to 100%, the rationale behind charging only to 80% stems from electrical voltage during charging. Typically, charging occurs in two stages: 0-80% and 80-100%. According to Android Authority, the latter stage involves higher voltage, which can affect battery longevity. Experts recommend maintaining the charge between 30% and 80% to prolong battery life, advising users to plug in at 30% and unplug at 80%. However, major manufacturers like Apple, Samsung, and Google do not specify a maximum charge level on their official sites. This means users are permitted to charge their phones to 100%, which is beneficial when using the device away from power sources for extended periods. Fully charging ensures longer usage before needing to recharge, compared to stopping at 80%. Rather than prohibiting full charges, these manufacturers highlight specific practices to avoid for maintaining battery health.