Full Version: Do Not Let The Batteries Get You
From: Harvey only (HARVEY-ONLY) [#6]
22 Nov 2006
To: Laser Image (LASER_IMAGE) [#4] 23 Nov 2006
The older computers and the motherboards in the EP module used 3 cell ganged NiCad battery with stakes welded to the battery and soldered to the board. It was before Lithium batteries were used because the CMOS of them good ol' days drew too much power for the Lithium. (The computer ran Win 3.1 and Opensystem software. It had a whole 4 meg of ram. The EP module had 1 meg of RAM.
Got to get with the old stuff so when you see it in the museum you will know what it is.
Look in your old computers, if the battery is the size and shape of a quarter it is a Lithium battery and can be replaced. If it is the size of about ten dimes together and has a plastic shrink wrap it is a NiCad.
From: UncleSteve [#7]
22 Nov 2006
To: Harvey only (HARVEY-ONLY) [#6] 23 Nov 2006
How about instructions on how to replace the old ni-cads without losing all your settings and so the system will boot when you go to restart it after the battery change.....
From: Harvey only (HARVEY-ONLY) [#8]
23 Nov 2006
To: UncleSteve [#7] 24 Nov 2006
There is usually a four pin jack on the board. It usually has a jumper across pin 2 and 3. You will need the information on your specific boars, surprisingly most are available somewhere on-line. You will need to know which pin, 1 or 4 is the + and which is the -.
Buy an external battery with four pin connector, unless your system uses a Lithium replaceable battery, then you need one of these.
The critical thing is static charge on your body, more than 15 volts will be a fairly good bet to blow out many parts in a computer. An arm or hand MUST be on the chassis if you do not have an anti-static wrist strap connected to the chassis. Turn on the computer after taking the case off, yes turn it on you will need power to the CMOS or you will lose the programing in the chip. Now carefully replace the battery. Do not touch anything else with the battery or you can short what you touch and blow things up. Be sure to place the battery in the proper polarity, if you get it backward it is likely to blow the CMOS chip and then the battery will literally explode like a big firecracker in a short time, like 30 seconds. The explosion can be dangerous.
Now you know why I did not explain how to do it. Best bet is to bring it to a computer store and have them do it. The Lithium batteries will give 5 to 10 years of service before failing.
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