Ahhhhh that makes much more sense then. I was reading into that way too deep Out of curiostity can you try another one of your batteries in the MATO tank to see it if does a similar thing? Do the MATO road wheels and idlers have bearings? Also can you time the run? How long does it run on pavement versus off-road? I'm always interested in this kinda stuff, especially with batteries. Also after the battery dies can you get a voltage readout immediately and about 10 minutes after?