Airsoft Battery?

[KenJ]

A friend sent me a note asking why he couldn't use this paintball gun battery

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=37844
1200mAh, weighs 55g

instead of this one

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=20841
1000mAh, weighs 62g

Obviously the connector would have to be changed, but the power to weight ratio looks really good. I suggested he get the plane version of the same battery
http://www.hobbyking.com/hobbyking/store/__11903__Turnigy_nano_tech_1300mah_3S_25_50C_Lipo_Pack.html

but the weight and cost are almost double the Airsoft battery. I've looked at the specs but can't figure it out.

 

[stay-fun]

I think I have an explanation:

THEY'RE LYING!



Seriously, an error in the site is the only conclusion.
Oh btw, the pack from the last link is a 3s, not a 2s pack. Still, they're lying about the first two

 

[KenJ]

Duh. 3S vs 2S is my error. The 2S is much lighter and cheaper:

http://www.hobbyking.com/hobbyking/store/__11902__Turnigy_nano_tech_1300mah_2S_25_50C_Lipo_Pack.html