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seen Mar 11 at 13:44

Oct
8
awarded  Commentator
Oct
8
comment Replace laptop cable with NiMH batteries
Oh and about the 1.5V above the regulated output: I'm considering connecting all my 32 batteries serially, resulting in 40V, and using the regulator to get 19V output. All of them are of same brand and model, so at least theoretically that should work.
Oct
8
awarded  Supporter
Oct
8
awarded  Scholar
Oct
8
accepted Replace laptop cable with NiMH batteries
Oct
8
comment Replace laptop cable with NiMH batteries
Thanks for the help, think I got everything I need to move forward. I will keep this thread posted on my progress :-) And about 4Amps, I believe this is the very maximum the computer would pull. With new internal battery 4400mAh the device would run for about 4 hours, which indicates that normal usage will be around 1A.
Oct
8
comment Replace laptop cable with NiMH batteries
@Moab Just out of curiosity, how would the BIOS be able to detect what is connect to the DC jack? It could really only measure voltage and amperage, or am I missing something?
Oct
8
comment Replace laptop cable with NiMH batteries
@Linker3000 But the voltage would also increase, so shouldn't the equation become I=V/R = 19.2/0.8 ?
Oct
7
comment Replace laptop cable with NiMH batteries
Thank you for the detailed answer! As you say, it is important to understand why. It also explains my recent experiments of 2x16 batteries. After the initial use, voltage dropped, just like on the chart. Now this should do the trick (right?): elfa.se/elfa3~eu_en/elfa/init.do?item=73-067-77&toc=19829
Oct
6
comment Replace laptop cable with NiMH batteries
Thanks for the link, that's a really cool device to have! There's a few reasons I'm building it myself. For one, I'm curious to see if I can do it. Another reason is that NiMH batteries are really cheap. The main thing is probably curiosity and the need to build :-)
Oct
6
awarded  Student
Oct
6
comment Could I transform a laptop monitor to a disco light?
I imagine this would be a kind of "cold" light. Might not be suitable for what I want, but I'll try anyway. Any ideas of what voltage I should use?
Oct
6
asked Replace laptop cable with NiMH batteries
Oct
6
asked Could I transform a laptop monitor to a disco light?