Buddy has a supply of 3.7V LiPos for general electronics use, 1C, 1800mAh, max draw is 1.8A but full capacity is achieved by drawing 1C/5 or 360mA.
Connector is a JST PHR02
Product specs-
http://ultralifecorporation.com/be-c...geable/ubbp01/
These have been sitting in their box for a few years, I'm going to check the voltage on one tonight.