I've acquired a John Deere 1010 gas powered tractor. The battery is 8 y old and now dead. It appears to be a truck battery. An auto store said it wasn't the best for field work because the cells were not self-contained and likely one broke down and went bad. Any suggestions on the battery I should purchase. The tractor is used 5-10 x per year for bushhogging. Prices at auto stores and a john deere outlet range from $90-110 on a battery similar to what was in it. For this money, I want to make sure I'm buying the correct battery (and would love not to spend this much!). Thanks.