How to choose battery for Racing Drone Larger battery provides longer flight time. on the other hand It increases weight and thous decrease speed As the battery gets heavier, the increase in flight time becomes smaller. Eventually it will reaches a point where it just doesn’t gain any more flight time with bigger battery (even lose flight time). LiPo batteries (short for Lithium Polymer) are a type of rechargeable battery that is the battery of choice in the RC world . Chacteristic of Lipo Betteries RC LiPo batteries are light and can be made in any shape.