ALB-You can use either.
The IB's are like the older Panasonic 3000's in a way.You just had to treat them right but you got the benefit of a lil more voltage and lower resistance for better punch.
IB3800's VS GP3700's.
Ib's have more runtime,lower resistance,higher voltage and Cheaper.
Issue's?:Care is a lil more demanding but worth it.
GP's=Still a great cell and can be treated like a Nicad almost.
If you want a smoking deal on some IB's email me.
*****Look me up on Ebay. I will have alot of stuff going up as 7/7/2016. User name is Dalracer.**** This is going to be a BIG ONE!!!!!!
Just wanted to say Thanks to RcTech for all these years of Great Information.