LiPo batteries that are at the end of life should be recycled wherever practical. For safety reasons, it is best that LiPo cells be fully discharged before disposal (however, if physically damaged it is NOT recommended to discharge LiPo cells before disposal). The batteries must also be cool before proceeding with disposal instructions.
Contact the Maintenance Controller for further advice if unsure of the procedure:
If any LiPo cell in the LiPo battery has been physically damaged, resulting in a swollen cell or a split or tear in a cell’s foil covering, best is not to discharge the battery. (Jump to step 7)
Place the LiPo battery in an appropriately sized LiPo flame retardant charge bag or bucket of sand.
Connect the battery to a LiPo discharger. Set the discharge cutoff voltage to the lowest possible value. Set the discharge current to a C/10 value, with “C” being the capacity rating of the LiPo battery.
The “1C” rating for a 16 000 mAh battery is 16 A, and that battery’s C/10 current value is 1.6 A can be used. As such, a resistor or set of light bulbs can be used as long as the discharge current doesn’t exceed the C/10 value which can cause an overheating condition.
Discharging can also be done by connecting the LiPo battery to an ESC/ motor system and allowing the motor to run indefinitely until no power remains.
Discharge the battery until its voltage reaches 1.0V per cell or lower. For resistive load type discharges, discharge the battery for up to 24 hours.
Prepare a plastic container (do not use metal) of cold water. This container should have a lid, but it need not be air-tight. Mix in 1/2 cup of salt per 4 litre of water. Drop the battery into the salt water and allow the battery to remain in the tub of salt water for at least 2 weeks.
Remove the LiPo battery from the salt water, wrap it in newspaper or paper towels and place it in the normal trash. They are landfill safe.