The general lifespan of a Lithium Ion (Li-Ion) battery strongly depends on its age and usage. Because of this, most older laptops suffer from decreased battery capacity. A new battery pack (type: fpcbp17) for this specific laptop however can be difficult to purchase and expensive if you happen to find one. This article describes a simple, effective way and relatively cheap way of replacing the internal accu cells of this pack, reusing the charge logic and casing.

Warning: Dismantling Lithium-Ion (LiIon) accu packs can be potentially dangerous! LiIon cells are extremely sensitive for overheating causing explosion danger. Do not solder, or grind the cells more than necessary (1 second will do). Charge the reassemlbed pack in a safe environment first!

See the movie of an exploding Li-Ion accupack!

The specifications of the Lifebook B142 / B112 battery are the following:

type: fpcbp17
voltage: 10.8/3200mAh

1. Introduction
2. What you need
3. Opening the old battery pack
4. Soldering the cells
5. Reassembling the battery pack

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