At what percentage should I charge my iPhone?
Apple recommends, as do many others, that you try to keep an iPhone battery between 40 and 80 percent charged. Topping up to 100 percent isn’t optimal, although it won’t necessarily damage your battery, but letting it regularly run down to 0 percent can prematurely lead to a battery’s demise.
Is it OK to charge iPhone continuously?
If You’re Charging Your iPhone Like This, Apple Says Stop Immediately. Doing this to your phone’s battery can affect its lifespan. … According to Apple, charging your iPhone overnight or for long periods of time can actually be bad for it, USA Today reports.