DXAEC10 Professional 10 Amp Battery Charger, Battery Maintainer, Battery Trickle Charger

This DEWALT DXAEC2 Professional 2-Amp Automotive Battery Charger and Maintainer appears to be a basic float charger. Once the battery voltage goes below the float voltage of about 12.85 V, the yellow charging light comes on, and it charges at up to 14.25-15.0 V, about the same as a car alternator (see updated details below). It only gets slightly warm if charging for a long period, otherwise is cool. Doesn't seem to vary the voltage with temperature. I now have two of these. The one has an observed float voltage of 12.90, and the other 12.83. I've had the one outside under the hood at minus 5 degrees F, on a 75 foot extension cord, kept doing its thing. While it's probably not waterproof, it's fairly closed up, so a few drops of water probably won't kill it. It's probably safe to leave this connected continuously as a maintainer on sealed lead-acid (SLA) auto batteries. I've left it connected to a vehicle for a few months with very good results, vehicle always started right up. Note that before starting the vehicle, it's probably best to completely remove this charger from under the hood, otherwise cords could get pulled into belts, burned on hot surfaces, etc. If you do leave it attached to the battery when starting, be sure it's clear of all belts, and I also recommend unplugging it first. That way it won't go into charge mode while the vehicle is starting and running, perhaps giving the electronics in it a longer lifespan. Leaving the charger powered while starting could expose it to voltage and current spikes from inductance, etc. I also put a note on my dash reminding me or anyone else that the charger must be removed before starting and driving away! Seems like a well-made, durable product. The clips are a bit sub-par (cheap plastic, not a great grip on the teeth), but sufficient for the task and amperage. I've used one of them regularly for a couple years now. I would say it's suitable for anything up to a car or small truck, as a maintainer or slow charger. For Gel batteries, I am a little hesitant to use it, because often they have a maximum charging voltage of 14.4 volts. This charger seems to exceed that, briefly at least. Whether that's okay with the relatively low amperage is hard to say, but using too high of a voltage with Gel batteries can cause bubbles to form in the gel, which reduces the performance. I'd check the maximum charging voltage of your Gel battery. DETAILS Below are some detailed observations on charging, for those who want the nitty gritty. I didn't measure the current coming out of this charger, just the voltage while it was connected to SLA automotive batteries. When connected to a battery which is NOT installed in a vehicle (so it has no load on it), the charging circuit turns on and off fairly frequently (every 20-30 mins?) for brief periods. Once the battery drops below about 12.85 V, it will charge at up to about 14.9-15.0 V for a few minutes, then will shut off. When connected to a battery which IS installed in a vehicle (meaning there is always a small load on the battery), the observed charging behavior is somewhat different, and seems to be two-stage. In this case, when the battery drops below the float voltage of about 12.85 V, the charging circuit will come on and the voltage will begin rising gradually. This stage is probably constant-current charging at 2 amps. Once the voltage reaches about 14.85 V (which could take minutes or hours depending on the battery's state of charge), it will stay there for a few minutes, then will drop to constant-voltage charging at about 14.25 V. (Constant voltage charging means the voltage is held steady, which means the current is likely allowed to decrease below 2 amps. It's basically topping it off at this stage.) It will stay at that 14.25 V for maybe 30-90 minutes (depending on any minor loads on the battery), then will shut off. The battery voltage will then slowly decrease. In a healthy battery, it will level off at about 12.90 V. With most vehicles, there is still a small load even when off, so it will continue slowly decreasing. After usually a few hours, the voltage will reach the float voltage of about 12.85 V, and the two-stage charging cycle will begin again. All of this tells me that this is probably a pretty safe maintainer for a vehicle's battery, unlikely to overcharge by very much over time, yet keeping the battery well topped off. SLA batteries like a full charge, it helps their lifespan. So if you're not driving your vehicle every few days, keeping it on this maintainer continuously, or at least turning on the maintainer for a couple hours daily, will likely improve your battery's lifespan and performance. If you'd like to monitor what this or any other charger is doing, and keep an eye on a battery more closely over time, I found the ANCEL BM200 PRO 12V Lead Acid Battery Monitor to be very handy. You can see my review for that as well.

This is a fantastic battery charger, it has great features and works very well. They have improved the On button, the old one could break, because it was hard to tell when it was on. That was the only problem I had with the first one. Yes, this charger is so good, I bought a second one. One keep as a charger in my garage and the second use as a trickle charger on a car in storage. These chargers work great at both tasks. The display will also show how the battery is taking the charge, which makes it easy to stop a dead battery that is never going charge. I also highly recommend TOPDON BT200 100-2000CCA battery tester which will read the percentage of battery life left, letting you know in advance that a battery is going to die on you. Have been stranded a few times on the side of the road due to a dead battery. I have a Honda with a 7 year old battery, rated for 8 years, the tester rated it still at 100% which means it still has years to go. Nearly 3 years in the garage during Covid is what probably extended the battery life, but otherwise I would have needlessly replace a perfectly good battery. The charger and the tester, work well together to keep your batteries working and letting you know when it is getting to be time to replace them.

Piece of cr@p equipment!! It keeps going to 'reconditioning' for hours and days!!! It never charges the battery!! ANY BATTERY!! I keep pressing the CHARGE button and it keeps going to reconditioning. P I E C E O F C RA A A A A AP!!!

DeWalt’s quality is second to none. As someone who already relies on their battery-powered tools, choosing their battery chargers was an easy decision. I now use several different models to maintain various vehicle and trailer batteries, and they've all performed flawlessly—reliable, consistent, and durable. The digital readout is clear and helpful, and the build quality lives up to DeWalt’s reputation for rugged, long-lasting tools. What I appreciate most is how accurately they charge without the risk of overcharging, giving me peace of mind. These chargers are a dependable addition to my setup and have exceeded expectations.

Charges well and turns off when done, but only if the battery still has a small charge (not enough to start engine). If the battery is completely dead, I have to put my old, non-automatic charger on it for a few minutes to give it enough charge for this charger to recognize the battery and turn itself on. Otherwise it gives a bad/damaged battery icon on the view screen and does nothing.

I have a spare vehicle that I keep just for long camping trips. Sometimes the battery drains if I don't drive it for a couple months. To the point that it affected the lead acid battery and it needed to be replaced. With this device, I just have it plugged in all the time when the vehicle isn't in use and the vehicle starts every time even after several months of sitting there. I recommend it if you have a vehicle that you don't plan to use for several months at a tine.

This battery charger was a gift got my husband. He was thrilled to get it. He immediately unboxed it and set it up in our garage and hooked it up to a battery. He stated that he has owned many battery chargers but this was by far the best one he has ever owned. He likes all the options this charger has. He has used this charger every day since I have given it to him, Pros: it is small and compact which makes it easy for us to put under our work bench. It is surfy yet small making it easy to bring out to other areas in our large yard for use, it hs a retractable handle making it easy to pull where it needs to go and then safely put it away when done with use. It has numerous options for charging such as slow trickle and fast charge. You can also test your alternator. It is a great value for the money. Cons: I have no cons to report. Overall, this charger is great for our needs and was a great value for the money paid. I highly recommend this Dewalt charger.

Great item to help around the house for vehicles. Not overly big can be stored easy. Worked really well on starting my diesel truck which was dead! Working for a diesel is a huge plus!

I have an Audi, this battery charger has the battery rejuvenation function. As the battery is expensive and put in a stupid spot that also requires lots of patience for programming after a replacement. This process is highly recommended by Audi.

Cumple con lo la funcion que es cargar la bateria del auto

This is an awesome battery charger. Great value!

Great product exactly as depicted