Hi. I got 2 battery on this laptop, one basic + second on multibay. When I disconnect from AC and when I got 0% power on first then laptop don't use power from second battery and wont start even when I got 100% on that second battery, but when I remove from laptop basic battery then laptop will start from second from multibay battery but in this time when laptop running on additional battery and I plug in same time basic one then laptop just shut down.... There are any solution to force laptop to use 2 batteries without unplug first ?

mmh.. I have an old dell with multibay option, but I don't have 2 batteries.. anyway, in the pc's bios there is some kind of option on wich bay has priority; you can check if there is something similar in your bios too...

Man why you answer if you don't know even how compaq bios looks... Its not dell its compaq and there are no any option about setting priority to battery, second thing if you dont have 2 batteries so why you answer if you don't know what it can be ?

hey, I tought a little advice would have been better than nothing; on this website people share their own experince to help the others and personally sometimes I found very helpful a little advice or hint coming from the others.. As no one answered yet to your topic and as I have computer with similar dual bay situation (dell latitute CPx) even if I never had a compaq notebook my advice was to look in you bios (thing you dind't mentioned you did!).. I tought it would have been helpful, sorry for that.