Laptop batteries can be repaired but such work only makes economical sense for smaller operators.
The success rate varies with battery type.
One must remember that the ‘smart’ battery consists of two parts, the chemical cells and the digital circuit.
In some cases, the chemical part can be fully restored but the fuel gauge may become inaccurate or other data may get corrupted.
Anyone attempting to repair SMBus battery must be aware of some non-compliance in the SBS forum.
Unlike other tightly regulated standards, the SMBus protocol allows some variations.
This may cause problems with existing chargers and the SMBus battery should be checked for compatibility before use.
During cell replacement, the circuit of many ‘smart’ batteries must be kept alive with a supply voltage.
Disconnecting the circuit, if only for a fraction of a second, can erase vital data and render the circuit unusable.
To assure continued operation when changing the cells, connect a secondary voltage through a 100 Ohm resistor before disconnecting the cells.
Remove the secondary supply only after the circuit is fed with the needed operating voltage from the new cells.
Build yourself a complete charging, discharging and managing lithium ion pack battery system
with smd components. I do this.
Follow the link for complete instruction manual to build battery control system.
Author: Petar Avramovski
Source: Magazine “Emiter”