Make sure you set the little black tab to "LiPo".

I have the Raider and it should have no issue, difference is that the Granite has a smaller pinion and bigger tires. I think it is your charger. What charger are you using? Typically, the newer charger with a cell balancing will take care of the issue. Early when LiPo first came onto the scene, I was using the ICE charger and many of my LiPo batteries puffed up. Switched over to the icharger and problem solved.

How you store your battery is vitally important. If your charger does not have "storage" mode and you just brought your batteries from the long winter break, your batteries will no longer be any good. That being said, even if LiPo are charge to "storage" mode, you still need to take them out once a month to check on voltages and maybe even recharge/rebalance them to make sure things are kosher. Take it from me, I have had couple hundred of dollars in batteries go sour on me due to these little mishaps. Invest in a good charger, a good power supply and when money permits, get rid of the brush system. Team Novak just announced a new sensored brushless 4-pole system they have for the budget minded people or try the HobbyWing setup. Going 3S on the brushed motor can really wear down quick especially if you go over grass and use it as a basher. Here is my Raider costing more then a stock B5M.