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4,358
4.4 out of 5 stars

6V & 12V Multi-Purpose Battery Charger

$35.99
$129 72% off Reference Price
Condition: New; Open Box
Model: G3500
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Top positive review
3 people found this helpful
A+ charger, but buyer beware, AMAZON may send you an older model with no lithium charge mode!
By M. Woodco on Reviewed in the United States on January 25, 2015
I'm a power sports tech by trade, and I've been a gearhead since well before that. Many years ago, my search for the ultimate charger led me to the CTEK and NOCO lineups, and I eventually purchased a CTEK entry level model and was very pleased with it. Fast forward almost a decade and I need a charger that can handle deep cycle batteries a lot faster than my old CTEK. I compare the NOCO genius and the current CTEK chargers. With more experience in the power sports industry I decide to try out the NOCO genius this time around. One of the main factors influencing my decision was the Lithium charge mode on this charger, as lithium batteries are becoming a very prevalent aftermarket accessory on newer motorcycles to save weight (More on this later). However, just today at work I wanted to charge a lithium battery, and noticed Amazon sent me an older model with no lithium charge mode! Thats mostly my fault for not checking the charger when I first got it, but I will contact Amazon and see what they will do as the picture clearly shows a charger with a lithium mode. How well does this charger work? It's amazing. For powersports batteries, I can charge almost all but the largest ones and smallest ones at a rate between the charge specifications low amp rate and the quick charge amp rate as indicated on lots of batteries. If I am waiting on backordered parts for a customers unit I can hook their battery up long term and there will be no damage to the battery. If I am building a motorcycle and the customer keeps asking when it'll be ready, I can point to the very easy to understand percentage LED lights and tell them that ideally they should wait until their battery is fully charged. The percentage LEDs make it very easy for me to show anyone whats going on with their battery without having to explain amp settings, volts, amp draw from the charger, etc. etc. and take a guess as to when their battery will be done. Another BIG plus on the NOCO genius line VS. the CTEK line is the accessories. One of the key accessories that I bought the NOCO genius for was the male to male adapter. This opens up infinite posibilities as you can now adapt to and from SAE connectors. What this means is that I can get adapters to use this charger to charge a bank of four batteries, I can use some adapters to install heated grips on my bike with the NOCO battery leads, I can adapt from an SAE connector to my NOCO battery leads and charge that way for example if I wanted to use a battery tender but already had the NOCO genius leads installed, There are endless posibilities with the NOCO accessories, one must only use their imagination. You don't get all of the available accessories, quality, or user friendliness (I.E. percentage LEDs) with any other brand of smart chargers I have come across yet. It is for these reasons, and many others that I recommend the NOCO genius line of chargers over many others. I'm sold on this line up until something better comes out, and I think you will be to. The only thing you might regret is not buying one sooner! P.S. about the lithium batteries. Many newer sport bikes like the CBR1000RR now have smaller batteries than the 600cc sport bikes! The manufacturers did this in an effort to have their motorcycles weigh a little less than the competition, and many owners kill the tiny batteries they come with in no time. KTM's are another example, many of their offroad bikes are now electric start only with TINY batteries! Owners of these bikes who don't know how to use the "choke", fast idle, or whatever it may be, kill their batteries all the time then come into the dealer and buy a lithium battery. It's for these reasons that a lithium mode is important to me, and I wish Amazon sent me the newer model with this mode! oh well.
Top critical review
2 people found this helpful
Warranty not worth the paper it's printed on
By John Ellis on Reviewed in the United States on December 10, 2017
Update: April 2020 One of the indicators on the front panel has died. When the unit is first plugged in the lamp for the .9A cold/agm setting doesn't light up. Unfortunately...in order to get into subsequent modes from this point, you have to first enter this mode, then hold the button down for several seconds. Since this lamp is out, it's kind of a guess and takes quite a bit of fiddling now to get into that mode. When I contacted NOCO about a warranty return/replacement their answer was that I needed to send it back to them, including a check for 35% of the current MSRP. So...in essence they're going to simply sell me a new one at their manufacturing cost. Wow.....what a great warranty, NOT!!!! Original Review: I got this specifically to try and rejuvenate a variety of 12 and 18Ah batteries I had sitting around from different projects (scooters, UPS, etc.). What I've determined so far is that it will "help" a borderline battery just a bit (at least according to my tester) but if a battery is very far gone (been discharged below 10VDC) then there's little chance of success. While the tester is on you can see the % charged lights slowly turn on and off indicating the charge state. If you put a multimeter on the battery during this phase you'll see the voltage rise and fall in sync with the lights from about 14.5 up to about 16.5 (hard to measure with a digital voltmeter as it's constantly changing). This tells me the "secret" to the rapid charging is that they just cram an extra 2 volts of input but vary it to prevent damaging the batteries. Another reviewer indicated they use a high frequency pulsing to help break up sulfation in the "Repair mode" but my meter couldn't detect it (need an o-scope). Overall it's not a bad device for the price. It did a nice job of at least helping a set of scooter batteries that were on their way out. I've used it to top off an extra starter battery that I keep for emergencies and it brought it to 100% then tapered off. I may leave this connected to just see what kind of job the device does as a maintainer. One word of warning. I thought there were actually 2 sets of leads but there are not. The eyelets are connected to the clamps with a pair of screws. So you can have the clamps OR remove them and connect the cables directly to your battery with the eyelets (but not both). NOCO seems to sell a variety of other cables though that will connect via their proprietary quick connections on the harness (they should have just used Anderson connections). The case is plastic so don't let it come crashing to the concrete floor and it should last just fine. I wish it had a voltage display instead of the flashing lights and pushing the button to cycle through the modes is kind of annoying but it does remember the previous setting if you don't unplug it from the wall. Having some sort of battery health meter built in would be a very positive selling point. I'm doing the same thing with an external meter but it would be very beneficial to be able to see how "dead" your battery is when you first connect it.

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