Guys,
We're in a tough spot here. We have to live in the sandbox that everybody plays in. We can't call out products as being good or bad. In most cases, a battery will work as well as any other. You guys are not talking about most cases in these applications. These are the highest power setups in RC brushless at the moment, and then you guys are pushing them to the bleeding edge with your gearing.
Let's compare this to full size racing. Few expect to put lowest-bidder parts in their race cars. There's a reason racing is so expensive, high end performance requires that every component in the system be of equally matched capabilities.
I think all modelers learn the lesson that when you buy cheap you generally wind up buying twice. Unfortunately that lesson is often an expensive one. We are modelers too, we work very hard to bring top notch components to the market at a great price for value received.
All that we can say is that not all batteries are equal. Price is sometimes, but not always, an indicator of a battery pack's ability. There's generally plenty of guys on line who have experience -- both good and bad with cells. Unfortunately, we can't be the ones to comment on that.
The Monster setup will take all the power that you can give it. We suggest using the biggest, baddest batteries you can possibly put in the thing. If you aren't sure of the abilities of your packs, start small and work up. Start with 4S and a small pinion. Racers don't start out in Top Fuel or Formula One either!
Hope this makes sense.
Now for the guy who wants to put 1,800 mAh cells in his truck and call it good: I want to put Brembo red brake calipers on my Toyota minivan. Think they'll make it look faster?
Lee