I have been shopping for a new trickle charger, too many toys. I have a battery tender plus and this optimate 3. I am kind of a battery freak. I keep things charged up on a rotating basis. That is I move the charger from one battery to the next in rotation. This thing is always on.After / before charging I always use a digital volt meter to see where the battery is at.
The desulfate / restore mode must work. I have batteries of 16, 25 and 35 amp hours that show 12.7 to 13 volts and are all 5 years old or more. the Odyssey 625's in the waverunners are 6 years old and show 12.7 to 12.8 volts still.
The 25 amp sealed lead acid battery in my Cessna is 4 years old and still shows 13 volts. the 35 amp sealed lead acid battery in my Piper is 6 years old and still reads 13 volts. Amazing, I had always needed a new battery by the 3rd or 4th year before I used this charger.
I read a lot of bad reviews of the battery tender where the unit failed. This charger gets used a LOT, and in over 5 years works like the day I bought it. The old made in china battery tender plus I have works just fine, but no desulfate mode.
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