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Vexilar batteries??


pike doctor

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Hate to be the bearer of possible bad news...but if you're batteries are completely dead they may not take a charge and may need replaced. I would charge them at least 8 hours and see what you come up with. You should keep these batteries at full charge and top them off every month or so when not in use.

Chad

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I just purchased a new battery and charger yesterday. The instructions say that it typically will take anywhere from 12 - 24 hours to completely charge a battery. A dead battery needs 48 hours to charge. You should also not let a battery stay on the charger more than 72 hours after it has been fully charged.

A new battery and charger cost me $25 at Gander Mountain if anyone is wondering about prices for new ones.

Batteries also will not charge if they are cold.

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Look on your charger to see what rate it charges at.

500 milliamps(1/2 amp) charger for example is a common size.

So with that charger and a dead 7 amp hr battery it will take 14 hrs to charge.

Lets say your battery isn't dead. You used your flasher for 8 hours. You'll have to know what the flasher draws. A Vex is somewhere around 300 milliamp or a 1/3 of and amp.

That'll take about 6 hours on the 500 milliamp charger.

You can get an idea of how long battery should last too.

7 amp hr battery getting drawn down at 300 milliamp will get you around 23 hours of use. Of coarse if the battery is cold that number will be lower.

You should charge your battery after every use.

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Quote:

I was told by a couple of different people to run them all the way down b4 I recharge them. They are still good batteries. Am i doing it wrong? And can they be overcharged?


These batteries are a sealed lead acid type battery. The battery in your vehicle is mosl likely a lead acid battery also. Has anyone ever told you that it is good to run the battery in your vehicle completely dead before you charge it? These batteries don't develope a "memory" like some other types do. I have a feeling that you will be buying a couple new batteries. Let us know how they come out. Also, there is a rule of thumb that says to charge your battery for twice the amount of time that you have used it and charge it at room temperature.

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alot of the newer chargers have a shutoff on them so you can leave them on for a day or so and check back. I don't think they are fool proof. I have one battery that will keep charging so I just let that one go overnight and take it back off. The rest of them quit charging automatically (little charging light goes off)

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NO. Here is a chart to determine your battery state of charge.

voltchart1.gif

If the battery has been charging, then it's important to let the battery set for 2 to 3 hours without a load or charger connected to stabilize before testing. Otherwise, your reading will be high, caused by a phenomenon called "surface charge".

The chart above, and most other ratings applied to lead acid batteries assume that the battery is at room temperature: 21 degrees C or about 70 degrees F. As the temperature of the battery drops, so will the fully-charged voltage reading. It seems to be safe to say that for each 10 degrees F drop in temp, you can expect to see the voltage drop of about a tenth of a volt. (.10 volt) That means that a battery at 32 degrees F with a no-load voltage reading of 12.35 volts is fully charged. Hope this helps.

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Swag that good news. I've been running a radio with two speakers on the battery for 35minutes and it is at 12.64 now. Incase you were wondering, when I pulled it off the charger it was at 13.05 which you said was a misreading anyways. So 12.64 leaves me with some hope.

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Outboard motors generate voltages up to 16 volts when charging a battery. Most of the Vex batteries come with a red light green light charger. When it goes to green it is charged. It is common for a battery to read 14 volts after a charge with a DVM. When you measure that same battery the following morning the voltage will have dropped down to 12.65 on a good battery.

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