This whole leaving them stored fully charged is very wrong. You wouldn't like it very much if I told you to stay still after forcing you to drink several monster energy drinks, same with a lithium. Most of the nicer chargers have a storage charge mode. This will bring the battery voltage down to about half... for storage. They also recommend a lithium specific charger because of the voltage range of the lithium, it is very different from a lead acid or glass mat. Lithiums were designed to be charged and discharged, so they work great in total loss applications. They aren't really designed to take a quick hit and then get charged back up right away. The majority of this community isn't running total loss so these lithiums got a bad name from the start. Seal them up properly, keep them isolated from shock, and keep your voltage in check and they should last you a good while. I have several seasons on an antigravity without any issues.