What battery size and model do I use for my Live Wire GVD-505A Voltage detector?

According to the catalog page #130, it needs 2 - #LR44.

http://www.gardnerbender.com/pdf/products/Testers.pdf

LR44 Alkaline Button Cell Battery: BatteryMart.com

I get mine from here: Premium LR44 LR41 LR43 batteries alkaline button cells at Infinite Lights

I have too many devices that use LR44's and the "substitutes" available at "Radio Shack" just don't fit right.

So, I keep stock on those and CR2032's.

I can get a good price on them at a local industrial supply company. Industrial Supply Equipment from MSC Industrial Supply, if I drop in and order them. If I pick up, no postage, but it can take a week and a half.

Look at Radio Shack's prices for substitutes: RadioShack.com

The #357's don't fit quite right mechanically. Never tried the #76's.