Busch + Müller Toplight 2C permanent battery replacement

Adım 1 — Sawing to open the housing

Saw the lamp along the ultrasonic welding seam with a fine saw (e.g. Japanese saw).

Adım 2 — Open housing

The housing should fall apart into two halves after sawing

Adım 3 — Remove battery

Pull the old battery out of the socket

Adım 4 — Disassemble & recycle battery

Under the black foil there are two Li-Io cells in AAA size.

Adım 5 — Prepare new batteries

Buy 2x ICR10440 with solder tag

Adım 6 — Soldering and packing new batteries together

The outer solder lugs are soldered to the sheet metal (paper clip as soldering aid).

Adım 7 — Assembly / Mounting

Plug the power connector into the socket of the board

Adım 8 — Bonding the housing

Apply glue carefully along the contour (e.g. Sikaflex)

Adım 9 — Ready, function test

Clip the lamp into the holder