- Don't leave them plugged in over the summer, i won't even start to list the reasons.
- Do give them a full charge before putting them away
- Do cycle if possible (but always do a full charge before storing)
- Store them in a cool, dry place (don't let them get above 75*F)
- Use the AndyMark battery protectors when storing them
- If they aren't used until next winter, take off all the tape when you take them out of storage and check the connections and re-insulate.
A good rule of thumb is to try to use batteries for 3 years, then dispose of them. If you have too many, a rookie might like some.