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5

With the description you give, I'd say you connected them backwards with about a 99%+ assurance. Large amounts of sparks followed by heat are both VERY BAD SIGNS (as you soon figured out) and almost always mean you have the jumpers on backwards. Never trust what the covers on the battery says. Check what the battery says to be sure. If there is no way to see ...


3

Yes for the most part an AGM is a drop in replacement for your standard Lead Acid Battery. The charging voltages are almost identical. You are correct that they have a lower internal resistance and can be charged at a much faster rate. This shouldn't cause a problem on the majority of vehicles as the wiring in the car is designed to handle the maximum rated ...


3

The idea isn't to replace the amperage of the battery, but to boost (add to) what charge is available from your battery. The lower amperage output is fairly typical. For this reason and for the simple reason that these devices are made to be portable. If it had the same amperage as the battery in your car, it would weight about the same amount. Since your ...


3

The cranking amps required to start an engine are not the same as the cranking amp rating of a battery. I don't know the amps required to start your car's engine, but if it is less than 400 amps, then it will work. Higher cranking amps in a battery yields additional benefits. The battery can be used for more starts because less capacity is used on each ...


3

No, you do not need to disconnect the battery from the vehicle before applying a battery tender. Ensure, however, that you disconnect the battery tender from the vehicle before you go to start it. If you don't, some tenders will self destruct.


2

Corrosion on the terminals is due to hydrogen gas being released from the acid in the battery. It mixes with other things in the atmosphere under the hood and produces the corrosion you see on the terminals. Generally, if the corrosion is occurring on the negative terminal, your system is probably undercharging. If on the positive side, it is probably ...


2

It isn't very plausible that the battery was hooked up backwards. I believe what the mechanic was trying to say is that when the jump was attempted, the jumper cables were put on incorrectly and damaged everything. This sounds more than plausible to me. I'm not sure how you applied the jumper cables, but it can be done wrong very easily, especially if you ...


1

I think the problem is, one or both of your battery leads are not connected properly. You need to do two things when you installed the new battery. Ensure the leads are completely clean of any type of debris or corrosion. Second, ensure they are tight enough to have a proper and secure connection. I believe the Concorde has side posts on the battery. These ...


1

The sound of the clicking is from the starter relay. There is a little bi-metal strip inside of the plastic housing and it's flapping back and forth. It's the same concept as a turn signal, it's just happening more rapidly. It means the voltage on your battery is low. Even though you just drove it, it might not be holding a charge well. Very hot ...


1

First I'd clean your battery terminals, since even a cold battery at fullish charge will try to start. After cleaning, make sure they're clamped tight and there's no corrosion. Also, describe "won't start" - clicks, nothing, slow turnover, turns and stops, etc.


1

More than likely it would show up right away. If it was on before, and now it's off, I'd say the problem's fixed. The codes for what ever triggered the CEL would no longer be present due to the lack of battery power, so you cannot just do a scan on the vehicle. You can, however, check to ensure that battery voltage at rest and while the engine is running are ...


1

You should be checking the voltage directly at the battery. Battery voltage measurements need to be precise to tell if the battery is good. Open circuit voltage is as follows. 12.66 = 100% state of charge 12.45 = 75% state of charge 12.24 = 50% state of charge 12.06 = 25% state of charge 11.89 = 0% state of charge 10.45 - 10.65 = bad cell, battery should ...


1

I know this is an old forum, but i need to comment. i have a 1998 jeep grand cherokee laredo that i bought for my daughter to use. the battery was brand new when i got the jeep, but soon after purchasing it i would find if it sat a few days without driving it the battery would be completely dead. i searched online, asked my mechanic friends and didnt hear of ...



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