Model 12117: 12 Volt 1.33 Amp (12V 1.33A) Charger/Maintainer/Desulfator

Compact and easy to use, this product provides trickle charging and de-sulphate capabilities.I love BatterMINDer products and have several. This is relatively inexpensive and easy to use. It comes with two battery connectors - alligator clips and round lugs.The alligator clips lead can be attached to pretty much any battery, no matter what the +/- terminals are like. Though the clips are relatively small, they're strong and they work.The round lugs lead can be used to permanently mount a lead to your battery, if your battery has the appropriate sized screw/bolt connection (many batteries have these).Both connectors terminate with a quick disconnect from the charger and you can buy a separate extension cord (25') if you need more to extend the line to the main unit (plugs into 120V AC).There is a button on the charging unit that allows you to set the item into maintenance mode, but it's not really necessary if you're going to leave batteries connected for trickle charging. This unit automatically goes into maintenance mode once the battery is fully charged.I have one of these units permanently connected into my 12v battery in my gas generator using the round lug connector. It stays plugged in all of the time. When I use the generator, I just unplug the unit at the quick-disconnect and move it into position.I have another unit plugged into a deep cycle battery using the alligator clips. I've also used it to charge smaller batteries that have blade lugs.It gives me piece of mind to leave these charging units running all of the time so when the power goes out, my batteries are ready to go.If you don't need a FAST charge but you want a good quality trickle charger with de-sulphate/maintenance mode, then this unit is terrific for that.

i have tried many of the de-sulfinators, and they all work well.this unit works perfect, if you have the time to spare. it takes a few months to properly restore a battery, but if you have a summer car or bike that is not being driven durring the snow, perfect!i still have a battery that is on its 10 year mark , that works flawless, but it took a while to get back to such condidtion.bottom line, if you want the BEST charger/maintainer/de-sulfinator for a few MONTHS of storage, then get this.if you need faster results and can afford the price jump, try a[...] and get there charger.i do own a few of these and love them.i curently own 3 battery minders, a larger unit, and two of these smaller units. i will never go back to a regular charger or tender, as once i realized how much of diffrence this makes in the performance of the battery, i cant go back to the old tech of JUST charging.- a little info, these chargers also decrease internal resistence of a battery, so if you have deep cycle batteries, this will make a VERY noticable improvement in performace.(for a tow motor or RV battery)-i have also noticed and tested to the extreme, that the battery has a larger Reserve capasity after using this charger.(i noticed that my back up battery(stand by power inverter) lasted longer than it did when i tested it last year.-just keep in mind, this entire process takes a long time to recover a battery.Almost forgot, i have been using this on a car too (2003 VW gti) with great results for over 4 years, no problems, and i love how fast my car cranks and starts, compared to a cheap walmart battery tender. ( i always had to add water when i was using a tender, but not with this unit)

Arrived in good order with all items as described.Used this to charge a 12V, 35 Ah AGM sealed, Deep Cycle lead acid battery. The manual stated that it's minimum operating voltage is around 10.5 volts so it can't be used alone on batteries below that voltage, you will need to bump the battery up to that voltage then connect this unit if you have an old or abused battery.Manual stated the trip voltage that triggers the change from constant charge to float/maintenance is 14.7 V for AGM batteries. If you check with a voltmeter while charging you will not read that voltage until it is getting ready to trip. You should read a steady increase in voltage over time until you reach the trip voltage. The float voltage after trip is reached is 13.6 V for AGM batteries. The RED light should be on any time there is AC to the charger and if you don't see it the AC is out and you need to disconnect the charger from the battery to prevent parasitic drain to the battery just to be safe rather than sorry. The green light will start blinking in float mode and solid during main charging.The charger worked on my battery as stated it would in manual. And YES, the charger got warm while charging. If you feel it is not functioning properly test the voltage on the battery. It should never be below 10.5 volts, above 14.7V while light is solid green or less than 13.6V while light is blinking for an AGM battery. If it is outside of parameters or you can cook an egg on it you might want to unplug it or try it on another battery. There is always a possibility that your battery has a shorted plate inside it, especially if it is old or abused/bumped around a lot.This charger was used to maintain the battery as backup when solar panels were not deployed for use on the battery. In this type of setup, I would advise that this unit not be attached while the battery is connected to a solar charge controller, inverter or anything else especially since it has a desulfator putting an AC current on a DC line. You could cause RF noise or mess up DC circuitry over time since it is expecting to see pure DC unless your devices are made to handle that. I'm not sure how this unit operates in that regard and questions I asked about it went unanswered so I'm not going to chance it. Above all, do not operate your battery while this unit is trying to do its job.Also, the advertised description says it is not advised to hook multiple deep cycle batteries up for charging but page 9 of the manual says it can be done as long as deep cycle and starter batteries are not mixed and are of the same type i.e.- gel, flooded or AGM.Seeing as how I just got this charger and have never owned this brand in the past I have no clue on how long they last.