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I had AGM batteries in my 4 runner since the factory battery died. Normally, I use a typical trickle charger to top off over night if it hasn't been driven for 3-4 weeks. Works just fine. Anti-Gravity's Lithium in my 911s. I just love those batteries. it cuts itself off and there are three cranks left after a key-fob type device is depressed.
Battery Tender is what I use to top off the AGM. Maybe I am doing it wrong?
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