1. Avoid Consistent Drainage: Consistent drainage of battery is a high cause of battery cells damage, which results to low life span. If you want to have a good battery life span, you should always stop operating your phone as soon as it notifies you of "LOW BATTERY".

2. Always Change Off Data Connection while Charging: Always make sure your data connection is offed while charging yor phone or laptop, if you can't afford to off the device entirely because of receiving calls and messages.
3. Unplug When Filly Charged: Never your phone charging when it's fully charged to avoid spoilage. I recommend you remove battery from charging when its up to 90%. Don't listen to people who say "charge your battery for 8,5,2,4 or any number of hours, just unplog when up to 90%.