JR Transmitter Battery Upgrade Includes E-Z solder tabs for connecting + and - wires. BVM has been flying Sanyo eneloop cells for several months now with excellent results. Now, you can fly a whole weekend on one charge! These batteries have no memory effect and feature an extremely flat discharge curve providing consistent power longer than other cells. To install, simply remove 4 screws and a tape seal from the battery case, and resolder (2) tabs to the + and - terminals. As always, read the charging instructions that accompany the eneloop batteries.