This is a battery holder set between two seats in the cockpit of a helicopter. It was designed for my LAMA SA315 Heli. It replaced the standard flat plate that used a Velcro strip to tie down the battery. The box will hold a LIPO that is 94L x 45W x 32H. Some soft foam can be used to prevent the battery from moving around inside the box. A strip of Velcro can also be used across the top to secure the battery. It is NOT intended for acrobatic type helis.