48V li-ion battery designed for a small frame bag

*WARNING: Just a single 18650 cell has the potential to start a fire in your home / workplace. Building a battery is a very dangerous task that should only be done by an expert in electricity and electronics.* ----------------------------------------------------------------------------------------------------- Building of a 48V 65 cells battery for a specific frame bag (the 48V version of the work from the previous video). An interesting solution for easy installation and quick battery release.