My car battery was dead. This unit was fully charged. Yet, it couldn't start the engine. I had to jump from another RUNNING car to start. Why?
1750076
I don't know why in your case. But sometimes your current battery can be so dead that it needs more juice and charge than a mere jump can offer. I use my power station all the time.
1750077
I had the same problem. Used this unit as portable power during power outages, to charge phones etc., and it works fine for that. First time I tried jumping my car (with the unit fully charged) it didn't come close to turning over the engine. Jump-started the dead car from my other car with no problem, though. Yes, the power was switched on. Very disappointed that I can't keep it in the trunk and rely on it to get me out of a jam.
1750078
These units are meant to jump batteries that are barely dead, like a car you drive every day. They simply don't have the power to start a car that has been sitting for any length of time, none of the devices in this price range can. I'm not sure any of these devices at all can.
1750079
Should work. Mine does. Can you check amps from unit charger on battery with amp meter? Try again, recharge unit, clamps with good connection and try on dead battery and measure amps. If bad return to Amazon. Good luck
1750080
Sometimes the battery can be so dead that a jumpstarter does not have enough juice to turn it over. What you can do is just leave it connected for about 15-30 minutes and it will act as a recharger. This will then charge the battery enough to start the car. (Leave it connected as you start the car)
1129161
You can use this to jump start your vehicle and if the vehicle's battery is still good then letting your engine run for a while (usually 30 to 45 minutes) should charge the battery. If your battery won't hold a charge then its time to replace it. I don't think you will have good results trying to charge a battery directly off of this. This jump starter is basically just a battery itself that you can recharge by plugging into an outlet.
852148
Have not had this problem....but guess I would plug it in...starter will not work if it is discharged.
1620473
If you could tell the capacity of your battery then we may compare. I personally found this starter useful even for completely dead battery. In that case, I simply leave starter connected to battery for whole night to transfer some charge to car's battery. Then charge starter again and it always works... Also I noticed that if car has computer on board then you need to pay attention that after successful start there are no errors displayed. Those errors may mean that car will NOT charge battery and even after 100km drive, you will end up with the same dead battery. Wish you safe driving!
46697
I left my Neuron plugged in to recharge the battery overnight to see if it will power my mower again just to make sure and it started again after I press the start button. So I don't know why it did not start yesterday. I thought it had died. I am so confuse right now. My be the connection between the battery and the mower was loose. I will try to do some mowing just to make sure that it will run OK. Sorry for all the trouble.
720191
It did for me. I had a car sat on a drive way for several weeks without running. When I tried to start, battery was completely dean, so I charged over night and it worked.
1536770
That would be my big problem. If your car doesn't turn off that plug when the car is off it will stay on and run your battery down. So I've had to have my car jumped a few times when I forgot to turn it off. And that's bad for your battery.
806710
I purchased mine in 2007 and only recharged when it dropped below the green (which was not often). I never had a problem getting the battery to charge to 100% until recently when I accidently hit the inverter ON switch before closing up the car and drained the battery. Now it will only charge a little over 50%. I primarily use this for the compressor although I will likely buy a replacement just for the peace of mind of having a jump start capability. I considered replacing the battery as well but figure it probably isn't worth the hassle, but if anybody tried it, let me know how it turned out! I purchased mine in 2007 and only recharged when it dropped below the green (which was not often). I never had a problem getting the battery to charge to 100% until recently when I accidently hit the inverter ON switch before closing up the car and drained the battery. Now it will only charge a little over 50%. I primarily use this for the compressor although I will likely buy a replacement just for the peace of mind of having a jump start capability. I considered replacing the battery as well but figure it probably isn't worth the hassle, but if anybody tried it, let me know how it turned... » Read More I purchased mine in 2007 and only recharged when it dropped below the green (which was not often). I never had a problem getting the battery to charge to 100% until recently when I accidently hit the inverter ON switch before closing up the car and drained the battery. Now it will only charge a little over 50%. I primarily use this for the compressor although I will likely buy a replacement just for the peace of mind of having a jump start capability. I considered replacing the battery as well but figure it probably isn't worth the hassle, but if anybody tried it, let me know how it turned out! « Show Less
1322737
That cord is meant for recharging the unit not to jump start a car, You can not jump start any car that way with any product (only charge). The only thing you can do is do a slow low amp charge through the auxiliary power outlet ( I am a ASE certified tech and have seen people do much harm to the cars power outlet) Like others have said that outlet is fused and the biggest fuse I have seen is a 20 amp on that circuit, that is not enough amps to start a car.
266673
Your battery by itself will produce a lower voltage than the alternator of your running car. When voltage drops, amperage draw goes up. At best this can result in a blown fuse. At worst, this can burn out the windings in the compressor motor sooner. Most higher draw car electronics are designed and optimized with a running vehicle in mind. I would recommend starting the car for the best protection of the compressor, your fuses, and your battery, as well as better performance.
1265237
Your car has to be able to charge the battery that way so i'd check your owners manual just to be safe if you havent already. but we had a Toyota Prius and the ignition battery died so bought this and a quick jump kit. we jumped it from the cig lighter anytime the car wouldn't start. we never left it plugged in longer than to start the car.hope this helps!
1838948
I am not sure. I know mine did not come with a battery to start it. I had to buy a small car battery separately. Maybe that could be it???
2005745
Depends on what and how long your running. I was able to jump start my Toyota about four times before I needed to recharge it.
113509
It seems strange if the car starts and runs fine but the battery is drained by using the power window (with the new motor) when the engine is not running. Does the battery drain when you operate another window? If yes, then it's not the new motor you installed. I would have the battery tested to be sure it's good. Most local auto parts stores will do this as a free service. Otherwise there are some electrical issues that need to be diagnosed and corrected. Good luck...
1488699
To accurately test a battery, you need to provide an artificial "load" that approximates what that battery might typically be expected to do. A car battery has a LOT of capacity and it is beyond the capabilities of a small/simple tester like this to provide a sufficient load to test its capacity. So... if THIS tester says your car battery is dead... it is really dead. But if it says it is OK... it may still not be.
1198448
I hate to say that this item pretty much served as a paper weight. On the several occasions that my battery died, the Wegan EA2045 didn't help to jump start my 2010 Acura at all. It turns out that the battery was completely dead and my car would start only after a "traditional" jump start. It did charge my cell phone while I waited for someone who was able to help with a jump start :) If you do choose to purchase it and you're not satisfied, you'll find it very difficult to return as it's considered hazardous material as I found out. Amazon and the manufacturer however were awesome and refunded the full amount. Good luck!
18691
OldAmazonian says:~{Gadgets like this can typically be kept topped up with a jumper from the car's lighter socket to the gadget's lighter socket. The better cords for the purpose have fuses in their plugs. The car's own voltage regulator maintains adequate level for intermittently charging the sealed lead acid battery without damage.}~While this more than likely should work, I'd let someone else try it before trying it on my own unit. Unless I tore it appart an investigated how things are wired inside and did some actual electrical measuring, I'd not try it unlesss I was willing to chance that something might get toasted. OldAmazonian says:~{Gadgets like this can typically be kept topped up with a jumper from the car's lighter socket to the gadget's lighter socket. The better cords for the purpose have fuses in their plugs. The car's own voltage regulator maintains adequate level for intermittently charging the sealed lead acid battery without damage.}~While this more than likely should work, I'd let someone else try it before trying it on my own unit. Unless I tore it appart an investigated how things are wired inside and did some actual electrical measuring, I'd not try it unlesss I was... » Read More OldAmazonian says:~{Gadgets like this can typically be kept topped up with a jumper from the car's lighter socket to the gadget's lighter socket. The better cords for the purpose have fuses in their plugs. The car's own voltage regulator maintains adequate level for intermittently charging the sealed lead acid battery without damage.}~While this more than likely should work, I'd let someone else try it before trying it on my own unit. Unless I tore it appart an investigated how things are wired inside and did some actual electrical measuring, I'd not try it unlesss I was willing to chance that something might get toasted. « Show Less