LiPo batteries are now almost ubiquitous when used to power radio-controlled aircraft, radio-controlled cars, and large scale model trains, where the advantages of lower weight and increased capacity and power delivery justify the price.
Test reports warn of the risk of fire when the batteries are not used in accordance with the instructions.

LiPo packs also see widespread use in airsoft, where their higher discharge currents and better energy density compared to more traditional NiMH batteries has very noticeable performance gain (higher rate of fire).
The high discharge currents do damage the switch contacts due to arcing (causing the contacts to oxidize and often deposit carbon), so it is advised to either use a solid-state MOSFET switch or clean the trigger contacts regularly.
LiPo batteries are now almost ubiquitous when used to power radio-controlled aircraft, radio-controlled cars, and large scale model trains, where the advantages of lower weight and increased capacity and power delivery justify the price. Test reports warn of the risk of fire when the batteries are not used in accordance with the instructions.
LiPo packs also see widespread use in airsoft, where their higher discharge currents and better energy density compared to more traditional NiMH batteries has very noticeable performance gain (higher rate of fire). The high discharge currents do damage the switch contacts due to arcing (causing the contacts to oxidize and often deposit carbon), so it is advised to either use a solid-state MOSFET switch or clean the trigger contacts regularly.
Lithium polymer battery