You have been charging your phone all wrong !
I hate to tell, but you might be reducing your phone battery’s lifespan with certain charging behaviours. If you’ve held onto a phone for a year or more, you’ve probably noticed the battery doesn’t seem to last as long as it did when it was brand new. After two years many phones struggle to make it through the day on a single charge. Holding onto a phone past three years can even cause trouble for system stability.
How to charge your phone to maximize battery life?
No matter what you do, your phone’s battery capacity — which translates to its lifespan — will degrade as you use it, however you can significantly increase battery life. The best way is to avoid draining your phone battery all the way to 0% or charging it all the way to 100%. Older types of rechargeable batteries had ‘battery memory’. If you didn’t charge them to full and discharge them to zero battery they ‘remembered’ and reduced their useful range. It was better for their lifespan if you always drained and charged the battery completely.
Small but regular top-ups are much better for Li-ion batteries than long full charge cycles