LiPo Battery Maintenance
LiPo battery basic cell has a nominal output voltage of 3.7V. Cell voltage variate from 4.2V when fully charged to 3V when discharged. An extreme discharge under 3V damages the battery. LiPo packs have some basic cells connected one to the other. A 2S pack will have two basic cells. The nominal voltage will be 2 x 3.7V = 7.4V. The maximal voltage will be 8.4V.
The battery capacity refers to the energy stocked inside. It is the number indicated on mAh.
Charging LiPo batteries requires a specialized charger device. Other battery type chargers are not usable.
LiPo internal substances are flammable in contact with air. Therefore, the factory sealed the battery and, no air gets inside. But it is indicated to storage and charge it into a fire-proof bag. When used and charge, the battery becomes warm. It is normal. If it becomes boiling, probably the battery is damaged. Please consult someone with experience to decide what you have to do.
Do not leave the batteries unattended while charging! Don’t charge the LiPo batteries overnight! Don’t leave children under 16 years old to use them alone!