Jg is a good clone brand I have there au-v2 aug and its still pumping plastic at 375fps. I hope to pick up a new ak or svd soon, love me them aks
. As for the bat, JG has cheap bats in most guns just stick with it save up till you can pick up a better drand or go deans and get a venom hero at 7.3v with 2300mah. I personly would stick with it and not upgrade just yet. Save up for a higher rpk from a top rated brand.
I shoot my aug for a few secounds, but that cheap bat goes bad mid game. Invest on a better bat, treat the gun like a women (not to far), run .20+ bbs from Goldenball, kingsarmor, and dont WHAT EVER YOU DO NEVER OPEN THE GEARBOX UNLESS YOU KNOW WHAT YOUR DOING! Trust me never fun trying to find 3 tiny springs that fly across a room full of random boxes.
Hope it goes good for you! - Jonah