- Allow your battery to cool down before charging. This will help maintain their capacity over time. It is even more important for Li-Po batteries as cell failure can result in a catastrophic flare-up. Never attempt to charge a battery that has just been run or has not cooled down to room temperature. It is tempting, especially during races or other events, to try a quick charge in the downtime. Don't do this. Bring an extra battery instead. It is forbidden in many professional events due to the level of inherent danger. Even if physical damage does not occur when charging a hot battery, the lifespan and total charge of the power source may be degraded.
- Batteries all show the maximum charge they can hold and are listed at the prime voltage. Use the correct battery charger for your pack. Most Li-Po batteries should hold a charge at 3.8 volts and are considered fully charged at 4.2. Battery chargers are programmed to recognize this as the fully charged level. Bringing your battery to the fully charged level before each use will extend their lifespan. Never attempt to overcharge your battery for better performance. Batteries must be maintained at safe levels so as to not harm operators or bystanders.
- Batteries that will not see use for a month or longer should be charged for storage. Unlike charging for use, you do not want to have the battery fully charged. Do not fully discharge it, either, as it will not regain its capacity if you do so. Instead, charge the battery to its prime voltage. This will help keep the power of the battery for a long time, based on its natural rate of discharge. If you are using a multiple cell battery, your charger should have indicators for each cell that will indicate the charge level.
