1. You will need a #10 Torx driver and a #8 Torx driver to remove the screws from the lens of the RailLight. You may be able to ﬁnd these small Torx bits that can be ﬁtted into a driverhandle rather than buy both Torx drivers. A small slotted screw driver is also handy for prying any sticky parts.
2. Remove the three (3) Torx screws from the underside of the RailLight.
3. Pull the lens assembly from the LED assembly, leaving the rubber sealing ring around the base on the lens.
4. Remove the two screws that attach the reﬂector and LED circuit-board.
5. Remove the reﬂector and very carefully peel back the circuit board from the assembly to reveal the battery compartment.
6. Using the #8 Torx, remove the two screws from the battery compartment cover.
7. Remove the cover (some of the glue that seals the wires attaching the connectors at either end of the battery may make this a tricky job – take your time).
8. Remove the battery (remember which is the positive battery terminal). Try to keep the small metal battery connectors at either end of the compartment in place. If they fall out, carefully replace them in their slots.
9. Insert a new rechargeable battery. Be sure the positive and negative terminals are aligned correctly.