Ok - I have a external battery pack that takes 6V - but it tends to get.. uh.. dead after a full day of wedding shoots.
So last weekend I noticed Radioshack had 1000MAH 6V remote control car batterys + chargers on sale - 5$ each
My current pack has ~2700MAH, so I figured, hey, buy 3 more for 15$ and double my battery (if not even more, since I dont think the battery is all that fresh)
BUT I need to know how to wire these in parrelle so that I get 6V, not 18V. I assume from other battery sources, that when you "stack them" positive to neg, like in a flashlight, that it adds the voltages. So I would want to make Pos to Pos to Pos, and Neg to neg to neg.
Is there any downside to this?
Charging and discharging will still be the same current, just take longer, and last longer to discharge..

How many amps does your flash require?

the same that is provided by 4 AA batteries

well i did a whole damn wedding - and ummm
IT DIDNT DROP ONE LIGHT!! (4 out of 4 lights = full battery!)
I was simply amazed!

Nice!

sorry i missed this earlier... i take it you wired it up correctly!

you got it right, obviously. a parallel connection of batteries will add current capacity, and a series connection will add voltages. you should always charge them separately and disconnected from one another for best battery life.

since you had such excellent performance with the current config, consider running only 2 or even just 1 pack, and carrying the spares in your bag. it'll be lighter and easier to connect/disconnect.

Originally Posted by ride5000

since you had such excellent performance with the current config, consider running only 2 or even just 1 pack, and carrying the spares in your bag. it'll be lighter and easier to connect/disconnect.

Well the nice thing is that since they are NiCd the power / weight ratio is much better and adding all 3 extra packs only adds 1/2-1/3 the weight of the original, so its not really any better carrying them in my bag and worrying about checking the batteries.. Ill just leave em conected and on my belt and "fa'get'abu'it" - like my 12gb card!