Advent 7081 Cmos Battery

Hi all,

I need to replace the cmos battery in my advent 7081 laptop.
Does anyone know where l can find out which battery l need to buy, and how l can access it?
A technical manual would be ideal, but if anyone can be give me instructions l would be most grateful.

Many thanks

Geoff

Here is a link to a page that has some info. At the bottom are more links that might also help.

http://www.uktsupport.co.uk/advent/laptop/7081.htm


And here is another page showing how to change various laptop cmos batteries.

http://repair4laptop.org/notebook_battery.html


Good luck.

DR

Edited by rigacci, 21 May 2008 - 03:42 PM.

Hi,

THanks for your response, l trawled throgh all the links you gave me, and although there was a lot of good info there, l could not find any strip down instruction for the advent, do you have any othere info l can look at?

Many thanks

Don't really have any more info but most laptops have many screws on the bottom. Some are even marked with a Disk or a Keyboard, to designate what they are holding in.

You could try and remove screws, one at a time. Mark how long each one is and which hole they came out of. It is VERY important to put them back in the same spot.

Once you get to the motherboard, you will have to search for the battery. As you can see, everybody has their own way of doing it.



DR

I am trying to do the same thing, I just put the model into ebay "advent 7081 cmos battery" and have bought one there. However I still cannot get to the battery on the motherboard. Has anyone done this before. I unscrewed all the screws on the bottom and could get to the hard disk and memory and processor but not the battery on the motherboard. Can anyone help?

Did any of you guys find an answer to this? I've got the same problem.

Some are held in place with a piece of tape others use velcro
I've also seen a spot of hot-melt glue

The Cmos Battery is accessed by removing the keyboard. Take out the Main Battery to ensure the PC is completely dead. Then get a sharp pointed knife or fine watchmakers screwdriver and using a good light, find four plastic tags along the bottom edge of the keyboard. Start at the left hand edge and use a gentle lever pressure to lift the keyboard. Once the left hand tag is released the keyboard should lift slightly and as the oher tags are released it will eventaually hinge out from the bottom. It is attached by a ribbon cable to the motherboard but you dont have to disconnect it if you have a large work area, just move the keyboard clear and to the bottom of the laptop. You will now see a thin metal cover plate. Remove this noting where the top tongues are situated. You may have to loosen some screws ti replace this properly. At this stage you will still not see the CMOS battery. It is under the metal plate that forms part of the laptop frame. You will however see a small connector with red and black wires and marked BT1 or similar. You could leave the old battery where it is , glued and taped to the mother board. What a pain!! , and unplug the old battery connector and locate the new battery in the space where the keyboard ribbon cable stows. Or loosen off more screws which means taking off the top button cover and getting the old battery out. The bottom line is , this laptop has just about the worse design that I have seen re battery replacement. You must order the correct battery complete with attached leads and plug. No clip in battery system here! The braver or foolish ones like me might try and solder leads to a standard battery but this is DANGEROUS and not recommended unless you really know what you are doing. Battery could explode! with the heat of the soldering iron.