iRobot Lithium Repack
Originally uploaded by mikeysklar
I repacked my iRobot roomba battery with 8 lithium cells. This is my third repack. Originally I just replaced the bad cell. Then I switched chemistries, dumping the stock charging and using my own. Now I'm on my third repack and decided to spend a little money on fresh batteries. I purchased $45 worth of 2200mAh 3.7V 18650 cells through Amazon. These guys are really performing. The vacuum has no trouble running on carpet / wood floor mixes for well over a hour. My battery pack may look as if I gave it a lobotomy, but it sure beats paying $100 for a lithium pack on-line.