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i have 4 wheelers tractors tillers and all kinds of equipment that are used only part of the year the batteries constantly go bad from non use or not being charged enough i purchased this charger and it repaired 3 bad batteries and is currently charging the rest of the the only problem i wish i would have solved is finding enough money to buy the charger like this one that will do 12 batteries at a time it works and its great to leave on the equipment while its sitting no more dead batteries here and no more having to buy new batteries
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I have tried a variety of chargers. This is one of the best around. I have three of these chargers in various locations. I hook up all my vehicles and spare batteries when not driving to keep the batteries at optimum condition. (One should always keep Lead-acid type batteries in a fully charged state, and never fully discharge them.)I also used this to bring some of my older batteries back to life. For example, one of the older batteries would only register 12.6V when charged with a conventional charger, and quickly settled to 12.1 V at rest. After 4 days of pulsing, the battery is at 13.2V fully charged state, and 12.8V at rest. This battery can be used to help neighbors jump start cars, and it runs some 12V devices effectively during power outages.
Warning: Do not connect this to a bad battery that has a short. The battery will draw current at a high rate from the charger, and the charger gets very hot. Although I caught it in time, it may overheat and damage the charger. Always monitor the charger for a few hours when hooking up to an old battery, to watch for over-heating. Or test to determine that the battery does not have a short before hooking up.
I am also using this to try and maximize the life of the newer AGM batteries. We'll see how that goes.
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I have seen 3 of these identical models now.I have one that I bought last year, and it's a 2 channel model. It works fine for motorcycle AGM battery maintenance, my application. I continue to use this one.
I needed another 2 channel model (I have too many toys), and I bought and tried 2 of these units in a row, from different distributors. Both exhibited the same failure mode. I made a series of tests using 5 different motorcycle batteries to insure it was not the batteries. It was not to my satisfaction. The failure did indeed follow the charger unit each time.
So, the problem is the charger, on only one channel, would indicate a 75% charge, and never exceed that. That is, it would never get to 100% and then go to "float" mode. It appeared "stuck" at 75%, no matter which battery would be placed on the channel (all the same AGM battery type).
These two boxes had pretty close to the same serial number range, and were both pretty far (in numeric range) from my original (good) charger.
I suspect their latest firmware or software is not too well tested, and is "buggy". I'm not gonna try a 3rd one...
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