15V Batteries

[maylar]

I suppose this qualifies as a power supply question -

I'm intending to build a portable op amp circuit and would like to power it with +/- 15V rechargeable batteries. They would need to have a case style that I can get holder/clips for without having to fabricate my own. Current drain would be 50 ma or less.

Suggestions please?

 

[KatieandDad]

This all depends on how big you want the project to be.

15V x 2 is easy to achieve, you don't need big batteries for the current requirement but you might like bigger batteries so that you are not changing them every few hours.

I would use AA batteries, you can get holders for them in many combinations most of which have MN1400 (PP3) style connectors or solder connections.

+/- 12V may be easier to achieve and keep things fairly simple.