Well let's not spend time speculating and talk more about the batteries and where I got them from.
The batteries are all Turnigy Brand 7.4v 1800mah Li-Po's. I find this capacity large enough to last all day, (as long as you are not a super-spammer), but still small enough in size to comfortably fit in an ICS PEQ Box (hint, hint).
I purchased the batteries from Peter at HangarOne.co.nz, a local supplier who specialises in batteries, chargers and misc electrical parts used in many radio controlled or motorised hobby sports. If you need any of the above then you can order directly through the website or give Peter a call with any questions. Use the code AIRSOFT (either online or off) to get a 10% discount off your order!