The battery must be fully recharged before use.
A temporary short capacity of new battery will be resulted from not used for a long time, it is normal, the total capacity will be reinstated via used for 3-5 times.
New battery When first get the battery, use it out, charge for 5 hours for the first three times, use it out again, then it only need to charge about 5 hours for normal use.
Do not use inferior charger to recharge this battery in case of damaging the battery.
Do not disassemble or change the structure of the battery.
Do not put the battery in the charger too long.

SAMSUNG A51 BATTERY