The most important precaution is to get the best out of a phone battery, you make THE FIRST CHARGING CYCLE A VERY LONG ONE. So after plugging phone into mains with the phone switched off leave it like that for about 12 hours without switching phone on orr off nor attempting to use it during its initial charging up.
Equally important, after the completion of that 12 hour initial charge, switch phone on and start using it. BUT DO NOT put it on charge again again but carry on using it UNTIL IT EVENTUALLY SWITCHES ITSELF OFF because battery is completely drained sagain. Then plug it in, and charge it again.
From then on it will last and last and just charge it and discharge it as practicable and convenient. Probably two hours charge every few days will be sufficient and you no longer need to exhaust charge. If you do the above, you will find your battery will give you very good service for very many years before eventually i will need replacing perhaps after 8 years, although this vasries according to make and type.. But if you do not give it the first long charge and complete discharge as I advised above, your battery will wear out more quickly, and you may find it needs replacing within two years or less.



