Samsung, meanwhile, says its lithium ion batteries do best when kept above 50% charge. It advises against running the battery down.
“Repeatedly allowing the battery to drain fully may shorten its life and decrease its overall capacity,” the company says in an online guide. “If this happens, you’ll need to charge the battery more frequently and it may last only a few hours before needing a charge, for example.”
Avoid extreme temperatures
Apple says says that batteries warm up as they charge, which can shorten their lifespan. It warns against using your phone or charging it in very hot temperatures, above 95 degrees (35 Celsius), “which can permanently reduce battery lifespan.”
Samsung also says extreme heat or cold can damage batteries and warns people not to, for example, leave their phones in a car’s glove box when it’s very hot or cold. And don’t put your phone in a freezer either, it’s a myth that it can prolong battery life. “This is not correct and can damage your battery,” Samsung says.
Google, which makes the Android operating system and Pixel phones, says hot batteries drain faster, even when they’re not in use, and that can damage the battery.
Adjust your power options
Tweak your device settings so apps or features use less power, which extends your battery’s daily life and the time between charging cycles.
You can turn down your phone’s screen brightness, turn on the dark theme and reduce the time for the screen to power off. Enable the auto-brightness feature, which adjusts screen brightness according to the level of ambient light. Also check battery usage in your settings to see if there are any power-hungry apps you can switch off or uninstall.
If the power level dips below 10%, iPhone users can turn on low power mode to stretch their battery’s life before it need recharging. Samsung’s Android phones have a similar “power saving mode.” You can also leave it on all the time, but it might affect your phone’s performance.