HP Omnibook 510 battery question

I got it free and am going to give it to my wife's mom.

The 6-cell lithium ion battery would only run it for about 10 minutes. I tried replacing all the lithium ion cells with new ones, made for cell phones, so I doubled them up.

Then, I just got blinking lights when pressing the battery circuit board 'test' button.

So I left it for a long time, several weeks.

Just picked up a complete battery conditioner, with a built-in balancer, normally about 100 bucks for 25.

So I disassembled it, but then probably waited too long (fell asleep) before rehooking up the old cells.

Figured out now I should have left everything alone from the beginning, done several drain and recharge cycles to recondition the cells, and would have had the pack like new.

Now I can charge the pack with the bench battery charger/conditioner/balancer, but the electronics seem 'dead' on the circuit board strip. The laptop thinks it's on AC power when it's on battery, and shows no sign of powering up the pack.

I'm thinking leaving the replacement cells out for too long, before I put the old cells charged, back in, made the circuit board 'forget'. Wondered what you thought I should do?

I'm a hobbiest and this is not my oldest laptop

BTW my wife has the lenovo 3000n200. Me, just an old sager D500P.

 

Sounds to me like you killed the battery pack. Time for a new one.

 

Found http://frantisek.rysanek.sweb.cz/battery.html

On how to reactivate the bq-chip.

Besides, I think I only 'killed' the board, made it go to sleep, not the cells.

What do you think?