Quote: (Originally Posted by
Outlaw)
Gilles,
that is some nice pics. call me stupid, but i was never good with electronics. (in terms of volt, amp, etc).
isn't that configuration making the output, 18v? could you explain a bit more? or do you aim to get a longer duration on that? because i have found some batteries on the net, which are supposed to be giving a triple amount of working time. i'll try and find a link and will post it for you.
to be honest, after this thread came up, i sort of liked the idea of having those batteries into my unit. that would have saved me from welding 5 batteries together and puting tape etc.
One question though. is it clear that a 9volt battery will work fine. what i mean is that people have tested them on their megs, as a "save a dive " battery, which would probably mean that it was used only for 3-4 hours at the most, if i am right. has anyone had them for ages on their unit? that isthe guy to ask if the electronics are ok.
Thanks.
Spyros
Ask me a legal question, then you'll see
By connecting the batteries parallel (+ with + and - with -) you will double the charge capacity (physical equivalent of doubling the size of a cylinder). These 9V batteries have a capacity of about 625 mAH. By connecting them in parallel, it now becomes 1250mAH, still with 9V.
If you were to connect them in series (+ with -) as we do with the 5 AA cells, then you add the voltage (physical equivalent of doubling pressure to your cylinder), and you would end up with 18V, and frying the electronics.
The 5 AA in series have some 8V and some 2800 mAH capacity, so will still last twice as long as the above paralleled 9V cells. I have had welded cells fail on me during a dive, and thus have preference for something like this if it works.
It seems ok on the secondary, and I will see how it lasts and how the voltage drops with time. Depending, I'll then try on the primary.