Revision as of 06:59, 5 October 2016

I have a few laptops that need new batteries. The fact that OEM is expensive and most of the time you cannot find any good after market I would like to rebuild them. I would also like to rebuild them because battery technology is better now and I think I can get better batteries.

Jump Starting Dead Batteries

One of the problems that I have read about is if the battery side of the battery circuit loses power then the circuit blocks/locks. Recommendations so far seem to be:

Jump start the circuit with voltage^[1] Independently charge the battery side^[2]

I have also read somewhere that you can never get the circuit to start again so during the repair process keep it powered.

It has been called a control circuit,

Really

• http://hackaday.com/2011/08/01/who-knew-thinkpad-batteries-require-a-jump-start/
• https://jaforeck.wordpress.com/2012/07/24/t40-recelling/

Recalibration

• To correctly build a battery pack, you'd have to clear the EEPROM through the SMBUS interface using a software.^[3]
• https://media.blackhat.com/bh-us-11/Miller/BH_US_11_Miller_Battery_Firmware_Public_WP.pdf
• http://be2works.com/ ??
• http://www.thinkwiki.org/wiki/Maintenance#Battery_treatment
• http://forums.lenovo.com/t5/T61-and-prior-T-series-ThinkPad/Battery-gauge-reset-destroyed-my-battery/td-p/72628
• http://forum.notebookreview.com/threads/toughbook-batteries-replacements-usage-calibration-feedback-and-experiences.528542/

Rebuilding Tips

• http://www.linuxjournal.com/content/rebuilding-laptop-battery
• http://www.engadget.com/2005/06/28/how-to-rebuild-your-laptop-battery/
• http://www.buchmann.ca/article21-page1.asp
• http://www.summet.com/blog/2007/02/17/laptop-battery-refill/ (BMS System)
• http://www.notebookreview.com/news/diy-laptop-battery-rebuild/
• http://www.electronicspoint.com/threads/opened-laptop-battery-to-replace-lithium-ion-cells-lenovo-x61tablet-pc-where-do-i-get-replaceme.226081/