Battery Charger & Maintainer

Old 09-07-2018, 10:08 AM
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Default Battery Charger & Maintainer

I use mostly Schumacher and Battery Tender products. Have zero turns, 4 wheelers/atv, motorcycles, boats, seadoos, campers, generators, forklift...all the standard stuff.

Having problems with some units (Schumacher) showing a battery as bad, but some units (Battery Tender) showing the same battery as good. I then put the Schumacher on a known good battery and it's shows that battery as good, so the unit seems to be operating properly. The units just don't seem to be consistent.

Which units do you find work the best. I've had great luck so far with the Schumacher units, but the Battery Tender products seem to be the standard.

Like you guys, have 40+ batteries around the house & shop and just want to keep them working as long as possible.

Old 09-07-2018, 11:51 AM
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I use the $9, sometime $5, harbor freight float charger on 2 antique cars, 2 boats over winter, and multiple ATVs that don't get used often. In 10 years, I think only 1 has failed.
Old 09-07-2018, 11:54 AM
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Amazon Amazon

I keep my boat batteries on this over the winter months, 4 years, no problems. Note, this is specifically for AGM, they make a model for "non-AGM".
Old 09-07-2018, 11:57 AM
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Check this out. I have one I bought from mac tools. will do 6v and 12v. AGM and standard batteries.
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Old 09-07-2018, 12:24 PM
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I have a pair of the Schumacher Ship n Shore 15 amp chargers. They offer a great bang for your buck. In a past life I managed a huge forklift battery fleet with some crazy fancy stuff. Guys at the local deka distributor put me on the Ship N Shore for my personal stuff. Has an automatic desulphation mode that works pretty well.

Amazon Amazon

I also have a constant rate 1 amp charger. Just a cheap manual one. If you ever have an older battery that doesn't have a lot of use on it, but has reduced life, they can be great at bringing them back. Charging at a low amperage constant rate and essentially overcharging them can bust up the sulphation and bring them back. Need to watch the electrolite levels, and do so in a well vented space. Also handy for jump starting a automatic charger if you hook it up to a completely discharged battery.

Amazon Amazon

I am personally not a fan of trickle charging anything, with the exception of the constant rate procedure. Batteries need to be charged to the proper level, with the proper amperage. There are some fancy units that use charge frequency/voltage variations to achieve the same results, but they are really overkill.
Old 09-07-2018, 01:01 PM
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I use CTEK chargers, they work well for me. I also have a couple of older simpler units which I use for charging up, but not for maintenance.
Old 09-07-2018, 06:00 PM
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Genius G750 for several years now for the boat and zero problems.
Old 09-08-2018, 03:25 PM
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battery tender - good web support

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