Need guidance figuring out which batteries to use.

White Devil

Hardened Shock Trooper
Joined
Nov 26, 2012
Posts
448
I got some laser module heads and they need
"3 VDC 25 MA"
I've been searching on Google and don't know how to word my search right I guess but I can't figure out which batteries I could use to power these. I'd like to use a single battery if possible.
Any guidance would be awesome. Figured someone here could steer me in the right direction.

Here's a pic of it.
image.jpg
 
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