This unit is great for wiring up 3 AA batteries in series.
A small, but mighty power supply. This board was designed to be as small and inconspicuous as possible.
Holder for single AAA size battery. 1.95" long x 0.50" x 0.50" high. Unbreakable black plastic. 6" wire leads.
Need to add more voltage to your regular 4AA battery pack? Parallax has come up with this ingenious plug in module that adds a 5th module to your AA quad-pack holder.