IBM L40 SX Battery Pack

Restoring the battery pack using standard "AA" size rechargeable batteries.

[ L40 SX battery pack picture #1 ]

Notice that the top half of the battery pack goes inside the bottom half. Knowing this, you should be able to break open the glued-together pack a little nicer.

[ L40 SX battery pack picture #2 ]

The original battery pack holds 2x9 special size NiCad cells in parallel and the open wire at the right is not in use any longer, but is left hanging. The + wires has a non-destructive fuse. If the battery pack is short-circuited or overloaded it will open the fuse and reconnect automatically again after a second.

[ L40 SX battery pack picture #3 ]

Close-up of the capacitor(?) connecting minus and ground.

[ L40 SX battery pack picture #4 ]

You must never, ever, solder directly on the terminals of a Ni-MH rechargeable battery!