Quote:
Originally Posted by nickair
I have used a "Battery Tender" for 8 years.
7 years was with the same battery. Replaced the battery because I thought I was pushing my luck, but the battery still worked fine.
When I was not driving or working on it, I had the battery tender hooked up.
http://www.amazon.com/Battery-Tender...ry+tender+plus

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I've got one of these, and USED to leave it plugged in all the time - until I found out the hard way that the battery was slowly being overcharged (meaning a bunch of acid seeping out the top).
Now, I just hook it up every month or so until it transitions from charge to trickle (the led turns from red to green), indicating that the battery is fully charged.