Selling Dean's Parallel Battery Adapters or "flux-capacitors" $10+shipping(hopup fee factored in) What is a Parallel Battery Adapter? It allows you to run two batteries in one gun, what does this mean? This splits the amperage/load between both batteries which essentially means you gain double the battery power or split the load in half on each battery. This is great for guns with crane stocks that can only fit small 1000mah lipos in each slot. (Very useful for KWA/TM recoil models that use the buffer tube space for spring system,taking away battery space) Rumor has it, if you run one of these and if your gun reaches 88rps your BBs will leave a trail of fire behind them! Any "Back To The Future" fans?haha