You must know the mah of the charger and the mah of the battery
for example. if the charger gives 1000mah and your battery is 3000 mah it takes 3 H to charge
1000 x 3 = 3000
You must know the mah of the charger and the mah of the battery
for example. if the charger gives 1000mah and your battery is 3000 mah it takes 3 H to charge
1000 x 3 = 3000