Will this work well for charging a vehicle battery that is completely dead and needs to be charged?
770535
The wattage of this unit is too low to charge a completely dead battery. It will only maintain a battery that is already charge,preventing your battery from getting drained even when parked for sometime.
770536
No. It will not charge a dead battery. It will keep a charged battery topped off. I purchased mine for a vehicle we rarely dunce that kept killing batteries. After installing this solar charger, the battery has never died again.
260868
This is a manual charger, I have used it on all most dead batteries, it should also work on those completely dead. Automatic chargers will not. As to the use as a power supply, I have not tried that, but my knowledge of electronics tells me, it will supply the voltage and current, the voltage will be unregulated and unfiltered.
51629
It charges a weak battery. If the battery is, for example 50% charged and it only takes several minutes to bring it back to 100%, some cells of the battery are dead rendering it useless. Won't jump start a car, not it's purpose. There are chargers/ jump starters, but be prepared to spend more $. It will, however,serve as a maintainer should you plan to leave the car sitting several days. It's all in the instructions. Be safe, read the instructions. On rare occasions batteries get hot (to the touch) meaning they are going to explode. I always touch the battery after a half hour or so.
1665889
Yup! I use it on my 12 Volt boat batteries and my 12 Volt car batteries. Like it because it shuts itself off when reaching full charge. My older chargers of a different make could overcharge a battery if left on too long. It is a tad slower than some chargers, but I believe a slow charge is better than a too fast one. I disconnect it when I notice a full charge is reached and in a few months will recharge the battery if the battery is left unused. Hope this helps.
597443
It probably depends on how bad they are run down. However, I recently used it to individually recharge 6 volt golf cart batteries that were down to 1 volt.
1665888
Yes...only if it is not completely dead. What I mean, is that batteries don't last for ever, so if your battery is on its last leg, you won't be able to make it like new again. If, however, you accidentally leave the lights on or something with a newer battery, this will charge it back up. I hope that makes sense.
2219683
I have never tried it with a fully dead battery. My understanding is that if you have a fully dead battery with dead cells, no charger would help. This unit should bring back a mostly discharged batter, although it will take a considerable time because of the low amperage. A higher amp manual charger would get the battery charged faster.
2129743
NO...this is a battery charger. You will need to dismount the battery and take it to a location where this is power for the charger to do its job.
284649
Yes..it will charge it. Takes a while if battery is drawn down all the way.
990238
Yes it will charge any 12-volt automotive battery quite well. It will NOT work on my older 6-volt automobiles....JOHN
1284871
It remembers. Note that if you have a completely dead battery that this charger will not work. I had to hook up my old charger for about 30min before the NOCO would take over. It's a great charger for recovery or maintaining a charge, but it just won't do anything with a dead battery.
1613398
I honestly wouldn't trust it to charge anything. It fell apart when I tried to use it on a cell phone during the electric outage this past winter.
2266388
If I understand your question correctly, no. If your car battery is really old and totally bad and incapable of holding a charge, I don't think this will work. It works great for a still good battery that has drained down due to leaving something on or something of that nature.
305021
Yes, It's really good at charging vehicle batteries. I've used it several times on my Ram when going remote for long terms.
1144039
The unit itself does not charge up. This unit is used to charge 12 volt automotive batteries.
51215
I would recommend getting a electrical charger. This one is more for something that you don't drive very often like a atv or a lawnmower. This only being 2.4 watts, isn't powerful enough to charge a car battery. It's really just for maintaining. I bet it would take a long time to fully charge a car battery.
1428441
This probably could charge a battery in a pinch as long one doesn't walk off and forget about it, but isn't something to use for off season charge maintenance. Apply the cost of this to a charger design for off season maintenance.