I would like to put together a solar mintyboost (i've done 1 regular mintyboost). I just upgraded my cell phone from an HTC Incredible to the Samsung Galaxy s3. In doing that I have a left over Li-ion extended battery from the Incredible. listed on the back as 3.7vDC 2150mAh (model BTE6300B). It has 3 contacts on the end, and I'd like to get some advice of using this battery (very low usage) as the storage for a Solarboost project? I really don't want it burning up or blowing up as I've heard they can do if done improperly. I'm an extreme novice, the 1st minty was my first soldering project. I just don't know how to go about deciding how to add this battery to my project safely. I'd like to use this rather than just recycle it. Any Ideas?