So I just replaced the cells in two battery packs for a HP DV1000 notebook. One pack was genuine HP and the other was some china ATG. I bought the replacement cells from All-battery (tenergy 2200mah).
The problem: I get about 2.5-3hrs runtime from the ATG, but only about an hour from the HP. I used the HP pack until the laptop turned off. I took the pack back apart and checked the voltage across the cells. Each was 4.2V.
There are 6 cells, wired P-S.
I'm guessing the PCB has to be faulty? Has anyone messed with a laptop pack to know if I could buy another PCB and using the factory connector, rig this thing up?
Thanks for any input. I know this isn't a bike light but I know many of you are well versed in battery packs!