I have a Compal FL90 notebook that is 4 years old. It's still running on the original AC Adapter (90W 19V 4.74A) and original 4800mAh 6 cell battery that is down to 1/2 hour of usable time.
Twice over the past few years I've attempted to purchase a new battery (7200mAh 9 cell), and both times the laptop will not charge the new battery. Instead of the regular blue flashing light to indicate charging, the light flashes a rapid orange. If I turn the notebook on with the new battery in it dies in about 1 minute (even after being plugged in overnight).
The batteries are marked as compatible with this unit. In fact, that's all you can buy now for this model - so it really makes me think the problem is specific to this laptop.
I'm wondering: is it possible that I need something stronger than the stock 90W AC adapter for the extended 9 cell battery?
The power supply 'brick' supplies power to the charger, and from what I've found online, the 90W brick is the highest output made for that model.
I see a 4400mAh, here - http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=230754682798
Did both that won't charge come from the same place/seller?