Busch + Müller Toplight 2C permanent battery replacement

crwdns2936071:01crwdne2936071:0 — Sawing to open the housing

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

crwdns2936071:02crwdne2936071:0 — Open housing

The housing should fall apart into two halves after sawing

crwdns2936071:03crwdne2936071:0 — Remove battery

Pull the old battery out of the socket

crwdns2936071:04crwdne2936071:0 — Disassemble & recycle battery

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

crwdns2936071:05crwdne2936071:0 — Prepare new batteries

Buy 2x ICR10440 with solder tag

crwdns2936071:06crwdne2936071:0 — Soldering and packing new batteries together

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

crwdns2936071:07crwdne2936071:0 — Assembly / Mounting

Plug the power connector into the socket of the board

crwdns2936071:08crwdne2936071:0 — Bonding the housing

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

crwdns2936071:09crwdne2936071:0 — Ready, function test

Clip the lamp into the holder