Greetings,
I got a Dell Latitude CPi-A with a dead battery. The computer is no longer worth the cost of a new one, so I tried a trick I used on a laptop with NiMH batteries before – run it on a cheap external lead acid battery (12V 7Ah, sustains a laptop for quite a Long time).
However, with the old laptop it was sufficient to leave the thermistor in place for the computer to recognise the battery and boot, on the newer laptop with the smart battery interface, this didn’t work. I connected the external source to the laptop through the charging circuit (or without it) and the best I can get is start the notebook on the original PSU, then remove it and it runs from the battery, but it won’t boot with just the battery.
Any insights on how to start it? Do I have to program a microcontroller to behave like an always-full SMBUS battery or is there an easier way?
Thanks, wondra
