Damaged Battery
If your battery is damaged, it will fail to charge. Causes to most battery problems include dropping and striking, immersion in water and other liquids and exposure to fire or heat.
Damaged Toy
If your helicopter has been exposed to water and other liquids, the electronic assemblies are likely damaged. If it has been exposed to intense heat for a period of time, the device may overheat and fail to charge.
Warning
Do not use a battery other than the one supplied for your Picooz helicopter. Do not strike or throw the battery on a hard surface. Do not leave the battery near a heat source or extreme heat.