Note: There is a report that cells from this pack came out with a voltage of 1.7-1.9v. New cells at this level pre-charged at 50-100mAh for a few minutes until they reach 3v before charging can have a good useful life, but you should keep an eye on them during charging. They should get to 3v within 10 minutes or so, and shouldn’t heat up significantly during charging. Once charged, check the voltage after a few days and make sure they aren’t lower than 4.1v or so.
Over on Ebay, Red Planet Trading is selling Dell 9 cell, 80Wh, 7200mAh battery packs for $14.99 with free shipping. They currently show more than 10 available.
The pack is labeled that the cells are made in Korea, which means Samsung, of LG. Capacity is probably 2,400-2,500 mAh/cell.
This isn’t the pack to tear down if you are looking for high capacity cells, but at $1.66/cell and $0.19/Wh, its a good value.
Looks like the same pack is listed a few different ways:
- Dell Latitude D810 D840 80WH 9 Cell Battery C5340 C5331 D5505 D5540
- Dell 80WH 9-Cell Type Y4367 Laptop Battery C5444 D5546 F5608 F5616
- Dell Precision M70 80WH 7200mAh Battery 310-5351 312-0279 312-0336