When looking for a new smartphone, battery life has always been a major consideration. Everyone wants their smartphones to last for at least two days. 

• Avoid extreme temperatures 
• Avoid fast charging
• Charge your phone to 50% for long-term storage
• Dim the screen brightness
• Reduce the screen timeout.

You absolutely need a phone with a large battery to accomplish that. It is straightforward to comprehend that the battery’s lifespan will increase with its size. A smartphone’s processor is also important because a smartphone with a better processor will use less energy to run the same app. 

Avoid using fast charging unless absolutely necessary. In fact, the faster your battery is charged, the better it is; therefore, if you don’t mind slow charging overnight, go ahead and do so. Your phone’s charge rate may be slowed if you use certain smart plugs or charge it from a computer that draws less current. I’m not sure if some external battery packs will slow down charging speed.

How to charge your phone correctly:

• The device should not be charged overnight.
• Always use a genuine charger to charge the device.
• Keep the charger disconnected from the power source.
• When the device is in low power mode, do not charge it until the battery power reaches 10%.