You’d never know it, but the way you charge your phone can be crucial for not only your electricity bills and safety, but also the lifespan of its battery. The phone batteries used today are based on a precise number of charge cycles and to make them last longer, it is advised to never charge them to 100% or drain them to 0%.
1. You always leave your charger in the socket.
A charger is constantly drawing power when in the socket, even if the phone is not connected. This is not good for your electricity bills. Plus, the transformer releases heat that can slowly accumulate and cause something nearby to catch fire, or if the air in the room is humid enough, it can short-circuit the transformer causing a fire.
If you are not using it, always unplug the charger from the socket.
2. You charge the battery to 100%
If you charge the battery of your phone to 100% every time, this will shorten its lifespan. This is because every battery has a precise number of charge cycles and if you always charge it to 100%, these cycles will end sooner.
The general rule would be to recharge the battery fully once a month and keep it between 20% and 80% at all other times.
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