• Please review our updated Terms and Rules here

Problems with external battery for 286 motherboard

DennisDC

Member
Joined
May 17, 2018
Messages
22
Location
Canada
I rigged together an external battery pack to try to save the CMOS settings on my 286 motherboard.

Basically I'm using a speaker cable attached to 2x CR2032 batteries, and according to my voltmeter it provides 3.6 volts, which should be enough to save some of the settings?.

YtgjKVp.jpg

However when I attach it to my 286 and leave the computer on, and shut it down and restart right away it it saves the settings but if I keep it shut down for 20 minutes and then restart it does not appear to save any of the CMOS settings.

9JTEhBT.jpg

From reading some other posts it appears I'm either screwing something up, or I need more juice, any advice ?
 

Chuck(G)

25k Member
Joined
Jan 11, 2007
Messages
39,412
Location
Pacific Northwest, USA
2xCR2032 in series should produce about 6+ volts. What are you doing? Parallel CR2032s don't make sense for a less than 1 ma drain.

Are you certain that the polarity is correct?
 

DennisDC

Member
Joined
May 17, 2018
Messages
22
Location
Canada
2xCR2032 in series should produce about 6+ volts. What are you doing? Parallel CR2032s don't make sense for a less than 1 ma drain.

Are you certain that the polarity is correct?

When you say polarity do you mean the cable are connected incorrectly ?
 

DennisDC

Member
Joined
May 17, 2018
Messages
22
Location
Canada
I used a different cell coin battery holder and now it "works" I'm using a single CR2032s battery (3V)
 
Top