Apart from Lithium Ion Batteries, Vengeance also make Lipoly Batteries and two of these are in stock right now at Airsoft Atlanta... "New Vengeance Li-Po stick batteries!. $15.99 for 7.4v and $21.99 for 11.1v. a few hundred in stock at our local Atlanta shop. The 7.4v is great as it fits in everything! Stop by and check them out this weekend."

We are seeing more Li-Ion Battery brands for airsoft and one of these is Vengeance which is available at Airsoft Atlanta. Here is their take and safety info on the batteries... "Vengeance Li-Ion Battery Review and Safety Airsoft Info.  How to charge and care for your Li-Po/Li-Ion airsoft battery. The difference between lipo and li-ion technology."

Airsoft Atlanta go in stock Vengeance Li-Ion Batteries in different sizes and capacities, giving their customers options in choosing which brands to get their Li-Ion batteries from... "New 2000-2600mAh 7.4v and 11.1 Li-Ion batteries from Vengeance! Using Sanyo Japanese battery cells, these are a 15c rated output which vastly out power 20c lower mAh styles, plus has more endurance for longer games on the battlefield.