Quote: (Originally Posted by
windymiller)
It is my understanding that the meg electronics need 7.2v to operate...Therefore, if I had 2 3.6v batteries of any description, wired together they should power the electronics..
I have seen plenty of 3.6v camera batteries and if they fit in the battery box, surely they should work?
Would they be wired in series or parallel?
As mentioned above, the Meg takes a range between 6 and 10 V, thus allowing a range of options.
When you wire batteries in series ('+' to '-'), you add their potential (i.e. 3.6 + 3.6=7.2) but charge capacity (i.e. duration) remains the same. So in this case, you add the battery potential to get within the range you want.
When you wire in parallell ('+' to '+' and '-' to '-'), the capacity is doubled whilst mainatining the same potential as the cells your using.
So the next issue is reliably connecting these together the way desired. If you have the proper tak welding gear, you can make great battery welds without frying cells, or... like me you can hot solder the cells together which at times can be life threatening.
Another possible option is illustrated here
http://www.rebreatherworld.com/offic...effective.html
using parallelled 9V cells. This is a low duration (~6 hours primary) option but also has a nice predictable voltage depletion with use.
Cheers