is it good to start dead car batteries?
137335
no it wont actually start a car but it will re-charge a dead car battery in an hour or so.
137336
Probably not. It is a small charger. Be aware that the charger displayed on Amazon's web site is not the model they will be sending you.
673249
If your car's 12V outlet works with the engine off it will. If you're going to be doing this for too long I would recommend againt it or you will end up with a dead battery.
1199906
i guess if you want to be absolutley safe about it, you could install a circuit breaker. i run my direct off the battery, works fine.
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.
632957
I believe so. At least enough to start the car right up. Fantastic battery for the price and way better than Optima now. Just be sure to get a trickle charger if you ever have to charge it. Agm batteries dont like jump starts either.
2125609
No offense, but you are making a common experimental error. It sounds like you are saying your car started because you put this charger on it for an hour. That is an invalid conclusion. You don't really know the charger was the reason the car started. To determine if that was the case, you'd need to charge the battery fully, then leave the lights on for the same period of time as before, then turn them off, immediately try and fail to start the car as you did before, and finally leave the car alone for the same hour you said you put the charger on the car. Then, try to start the car. This would be a true and valid A-B experiment. I'm betting the car would start in this second scenario. Anytime a lead-acid battery is run down to the point where it won't start a car, if you shut off the battery drain and let the battery rest for a while, the battery will usually recover and be able to start the car.
659526
Yes! it is excellent for car batteries and will maintain the charge without overcharging. - Len - 661-245-2000 - Racecrafters-USA
941267
It depends on your car some cars have slow constant drains in them from security systems and lighting and advanced electronics and these would trick the Sansour into giving incorrect readings on your batteries voltage so most of the time the battery is suggested to be disconnected but if it's just for a little top off charge you can get away with it
1488698
Only if you're sure the battery is dead!! Lol... No, the amperage from a car battery is way too high. It might be a creative way to void your warranty, that's for sure.
623827
It depends on the condition of the battery. An OLD battery could read 12 volts, but the voltage may drop way down when trying to start. A good battery might start a car with only 10 volts
247973
No. I use one for a tractor battery over the winter, 2-3 months between starts. Go for it. Maybe the battery will still be some good when you're able to get the boat in the water. Better, much better to keep battery up than to let it discharge too low. That kills batteries' life span. Especially in the cold.
1274032
"Give your car battery a boost from inside the comfort of your car with Simple Start new from Black & Decker. Being stranded with a drained car battery can cause anyone to panic!"Anyway we got our first review, now is it genuine or someone from B&D;?
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.
2243844
I have charged dead batteries with it. I would say it depends on what caused the batteries to die. Individual batteries may well be beyond recovery of any charging means. Let me say that if the batteries are recoverable, this system will desulfinate them to maximum normal remaining life
1975853
Yes, but you still have to unplug it when you start your car. Also if its anything like the one of got it wont last more than a few hours anyway.
492957
Yes, but make Shure you have a good battery and keep your car running, cause if you don't it'll drain it in about an hour
2219684
If it is totally dead it may not work. For dead batteries a manual charger works better.