So, you bought an Android phone that promised a rapid charging time up to some amount like 80%, but when you plug it into a charger you see a message like "slow charging" or "fully charged in two ...

I’m old enough to remember when most smartphones topped out at 5W or even 10W charging speeds. In fact, my first proper Android phone was 2012’s Sony Xperia V, and it offered a mere 5W power level.

Topping off to 100% every night might give you peace of mind, but it's slowly shortening your battery's lifespan.

Knowing when and how much to charge your smartphone can be trickier than it sounds, but many experts recommend a simple rule of thumb: you should generally maintain a battery charge between 20% and 80 ...

Smartphone plugged into a charger and resting on a nightstand by a bed. - Abdullah Durmaz/Getty Images Knowing when and how much to charge your smartphone can be trickier than it sounds, but many ...