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Home > Battery Tips
Charging

LiPo batteries must be charged carefully. The basic process is to charge at constant current until each cell reaches 4.2 V.
Be absolutely sure that the Lithium Polymer charger settings are correct for the battery pack being charged – both voltag and current settings.It is better to charge under 1C.So, for a 3000mAh battery, we would want to charge at 3A, for a 5000mAh LiPo, we should set the charger at 5A, and for a 4500mAh pack, 4.5A is the correct charge rate.

It's important to use a LiPo compatible charger that with built-in balancing capabilities.
Charging in this way can have damaging effects.
Balance charging simply means that the charger monitors the voltage of each cell in a pack and varies the charge on a per-cell basis so that all cells are brought to the same voltage.This helps with the performance of the battery.

You also should note that trickle charging is not acceptable for lithium batteries: Li-ion chemistry can not accept an overcharge.
Without causing damage to the cells.Possibly plating out lithium metal and becoming hazardous.Most manufacturers claim a maximum and minimum voltage of 4.23V and 3.0V per cell.Taking any cell outside of these limits can reduce the cell's capactiy and ability to deliver full rated current.



Discharging


LiPo batteries offer plenty of power and runtime for us radio control enthusiasts. But that power and runtime comes at a price. LiPo batteries are capable of catching fire if not used properly - they are much more delicate than the older NiMH/NiCd batteries. The problem comes from the chemistry of the battery itself.

So when running your LiPo, make sure you have the Low Voltage Cutoff enabled, set up correctly, and for the sake of all that is Holy, don't continue to run it after the LVC has kicked in! It may be a slight nuisance, but it's worth enduring so that your LiPo batteries remain in good health.

It's worth noting that most helicopter speed controls and some airplane speed controls do not have a Low Voltage Cutoff, as disabling the motor in mid-air wouldn't be a good idea. For these kinds of applications, it's best to set a conservative timer (some aircraft radio systems have a timer function built in) and land when the timer goes off. Whether your R/C vehicle has a LVC or not, it's not a good idea to fly until the battery dies!


Storage

Nor should LiPo batteries be stored at full charge, either. For the longest life of the batteries, LiPos should be stored at room temperature at 3.8V per cell. Most modern computerized chargers have a LiPo Storage function that will either charge the batteries up to that voltage, or discharge them down to that voltage, whichever is necessary.
Lithium-Polymer batteries can be damaged by sitting fully charged for as little as a week
. So don't forget to put your LiPos at storage voltage when you're done using them.
The most common problem people have with LiPo batteries is a direct result of improper storage.