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You need a big battery charger that can put out some real power. Not a battery tender or trickle charger that will only ever achieve a max voltage of 14v.
To do a real desulfur cycle and cell equalization you need to hold the battery to at least 15.5v for an hour or so. 16v would be better.
A 12 to 15 amp charger with "flooded" or "standard", a "gel battery" and "AGM" settings is what you will need.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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