GENIUS1: 1A 6V/12V Smart Battery Charger – Automatic Maintainer, Trickle Charger & Desulfator with Overcharge Protection & Temperature Compensation – For Lead-Acid & Lithium Batteries

Haven’t actually used it yet, but after watching loads of videos about it I just knew I had to get one. It looks so reliable and well-made. Just knowing I’ve got this NOCO charger in my boot makes me feel way safer and prepared, especially for winter. Definitely worth having handy!

Works extremely well. Does the job easily and it’s small and portable. Great value for money. Highly recommend this charger.

NOTE: THIS IS A TRICKLE CHARGER THAT GIVES A 1A OUTPUT SO THE BIGGER YOUR BATTERY, THE LONGER IT WILL TAKE TO CHARGE. IT DOES CHARGE BATTERIES OVER 30AH BUT IT WILL TAKE LONGER TO DO SO. I bought this product because my existing Trickle Charger couldn't recognise a battery that had less than 3% charge and, apparently my battery had fully discharged due to not being used a number of weeks during winter months. I decided to buy a product that promised to charge a dead battery so that if there was no remaining charge at all, I could get it going. My current charger can get my battery up to 100% in around 28 hours due to being Trickle fed rather han high voltage, so was happy to have similar. I expected this one to operate similarly but with the added benefit of recognising a battery with less than 3% charge. The packaging is great. Amazon delivered it without any outer box to hide the product, but it has a sturdy box so wasn't too bothered by having extra packaging. The product itself seems very well made, not at all flimsy and was easy to understand what to do. I so far have it going and thought perhaps it would need to be put on force charge as I believed it to be fully dead, but for some reason, it wasn't working for me, no matter how many times I tried to use that setting by pressing the button for the required 5 seconds. But it appears to be working just on 12v setting, so must have had at least 1% left. Initially I wasn't certain it was on standby mode, as it looked like an orange light from certain angles, but looks red from another. But it is charging, so don't despair if you see a pulsing light and not much else for some time, it is charging. It has a reddish light that's slowly pulsing off and on. If on standby it would just be a solid orange, no charge. I left it for a few days (note: my battery was almost completely discharged so a top up will take far less time) and it's now pulsing green, so it's almost done. I'd have liked to have some kind of indicator of a percentage or amount of charge its up to, just so it's clear its doing something, but it does what it's meant to. I hadn't realised when buying it that it was made for up to 30AH batteries, which excludes most car batteries, yet the description said nothing about this. Reading up on it though, it *can* charge batteries over 30AH, it's just going to take a longer time. So I would say that, if you're wanting to charge a car battery fast, that you get jump leads and ask a neighbour to jump start your car. Or, buy a bigger charger, from 2A upwards, that gives a greater output charge, thus reducing the time it will take. For me, I'm in no rush so I shall just continue using a Trickle Charger and I'm more than happy with this product.

Bought this item due to its popularity, good reviews, and its cost. Was a bit of a stab in the dark. But, I really am impressed with its ease of use and performance. With regards to the charging lights, there's only 4 different light sequences which keep it nice and easy to understand. Keeps my battery charged full throughout the winter evenings. Plus, you can keep it connected the whole time and just leave it, as it keeps the battery at 100% without overcharging it. A nice, compact bit of kit. Was quite surprised with how small it is, but it packs quite a good punch. Another cool thing I like, is that you can remove the clamps from the wires, and then just directly screw the metal rings onto the battery and leave it on. So when you want to charge, just plug it into the plastic socket at the other end of the wire. Makes it so much simpler to use. Overall, really happy. Been recommending to all my biker friends.

Battery on my caravan had dropped over winter slightly and hadn't got enough charge to use the motor mover. Put the battery on charge for 48hrs and it was fully charged. Great bit of kit would recommend

I'd left an interior light on in my car again and flattened the battery. It's an absorbent glass mat type and I knew that I needed a special charger for it. I'd read that AGM batteries do better with a slow charge so I bought the lowest power charger. I was a little concerned initially because the instructions it came with suggested the charger was good up to 30Ah and my battery was 45Ah. Actually this is just the typical charging times. It meant that the charger took a couple of days to completely charge the battery but that wasn't a problem for me. I'm delighted with how small it is. It takes up very little space when not in use, perfect for me who doesn't have a garage to keep it in, and one of my concerns when buying. I found it simple to operate. The instructions are brief but sufficient. The charging cable is directly attached to the unit but there is a connector for the battery clips. An extender cable is available if you need a really long reach but the supplied cable was more than enough for me. It also has a mode for prolonging the life of the battery which seems to be standard on newer chargers and something I am very happy about.

Brilliant. It works perfectly for Jaguar XF batteries. It did take 24 hours to charge but I’ve not had any problems since.

It failed to charge what was a nearly fully charged 6v battery from my classic car. 48 hours it was left on and it didn't reach fully charged. I stupidly didn't try it when I first purchased it so it is now out of the return date and absolutely no response from the seller even though it is supposed to have a 3 year warranty. Do not waste your money.

I ordered 5 units, but only 2 came in sealed packaging. One was used before, so it looked like a return. Other than that they all work fine.

Great UK port