so far I only run one controller with rechargeable AA batteries. Venom 2400mah nimh AA's in a 3ch 2.4ghz Futaba transmitter. I like them. They've outlasted any alkalines that I've put in there prior to using the rechargeables. I usually don't have to plan when I'm going to run because there's usually plenty of charge left in the batteries. When it's time to recharge, I spend the hour(?) to recharge them and I'm good to go for another couple weeks (depending on how much I use it).