5 Volt Supply

I am building a radio control remote for a camera requiring a 5Volt 13 m/a supply

and using 4 x AAA

Are any smaller batteries available to keep the size and weight down

Any Help appreciated

Many Thanks

I should have said 4 x AAA rechagable Nimhs

Ok, then use rechargeable button cells... but seriously... Lithium is the way to go for light. If you can make the system go on

If you've got a radio receiver, why not just steal power from that? mike

I bought 50 LR-44 button cells (alkalines) on Ebay for about $6 including shipping. They came packed in tear-off blister packs. These are the ones used for laser pointers and LED flashlights. They will handle 13 mA for a few hours. But they're only a dime apiece so you just throw them away and put a few more in. Four of them will give you about 6V, so you can put a 1N4002 rectifier diode in series with one lead to drop about .8V to give about 5 or so volts.

down

With the lower the volts and m/a the longer life I am trying to compromise

between this and working range

Many thanks for your help

Syd