Hello as many my know I build a fully working airsoft PR.
I made a gas tank and Li-ion battery.
I was not to happy with the battery as it was home made but it did the job very well and I did a few weekends of airsofting.
But I been looking a purpose built battery for the PR.
I been ask (Darren) time and time about a battery and I hope to find the answer very soon.
I found this company that make the new Li Polymer batteries.
Here the website link:
http://duremax.com/page13.htm
I have e-mail and I am waiting on a reply on what batteries they got for the size of the spacer in the back of the PR.
Soon as I hear any think I will post here.
Cheer's Steve