I try to make sure to limit the max charge percentage to 80 on all devices I use. Voltage in many lithium cells increase with heat, so if you're already at full

I try to make sure to limit the max charge percentage to 80 on all devices I use. Voltage in many lithium cells increase with heat, so if you're already at full charge you might overvolt you battery. This is why new devices are shipped with 66% charge, because the same applies to cold and undervolting, both ruin the cells.