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Battery question

Jim,

Thanks for you comment.

The curve in the Minelab manual is the battery voltage under use after a given number of hours. The 1.2V per cell (9.6V for the battery of 8 cells) occurs under load after about 12.5 hours of use in the detector.

HH,
Glenn

 
Did the batteries feel warm, if they did that was a indication they were being charged. Now putting these back in the battery pack and putting them in the Explorer what did the battery gauge read??
Using a 1.5 volt range on the voltmeter may show the batterys need to be replaced. I have a Radio shack battery checker and it will show they are at the replace range when I use the 1.5 volts range, but if I put it on the 1.2 Nickle hydride or nicad it will show fully charged.
Being your charger shows the red light I know it is making connection and the charger is working, but dont know if correctly, if not the lights would not come on.
If you have a multi meter a fully charged pack will show around 11 to 11.4 volts, but a battery tester will show around 10 volts as it puts a slight load on it.

Rick
 
If this is the case with the recharged batterys and you have a multi meter check the voltage at the battery pack at the end where the contact are with all the batteries in place, if there is nothing there put in a set of the alkalines to see the pack is OK and not a broken spring in the pack or one that got bent over as I have seen this on one. If there is voltage of 10 or more volts put it in the explorer and turn it on, if it wont come on then you have other problems.
 
I looked locally, and all I could find was a charger that did 4 batteries at a time, but he said they charged in 1 hour. Why 12 hours for one and one hour for another? Also, I'm not clear on what 1600 whatevers compares with 2300 whatevers.
 
I'm going to check them both out. I also have 2 tubes for batteries. I'm using 1.5 alkaline, and they work fine, so I'll throw them into the ohter tube to be sure the problem is not there.
 
Yes, they were warm, but the battery indicator on the detector never came on to look at. It was like there was no power connection. I'm going to get someone with multimeter.
 
pwrstream1.jpg


designed for 10 pack of AA's or AAA's - nicad or nic med hyd

powersource
mark
 
The charger should have been charging, so even if one battery was bad it should still power up. I feel the problem then will have to be either the pack is bad you you put them into or one or more battery is in wrong and where a multi meter testing the output terminals will verify if there is any voltage at them. The other option would be put the alkalines in this pack and the rechargeables in the alkaline pack and see what happens. It is just a mater of process of elimination.
 
The "whatevers" are milli-amps and the 2300/1600 is the amount of milli-amp capacity. It is based upon the number of milli-amps that can be provided for 1 hour duration. Amps (amperes) is the measurement of current. 2300 milli-amps equals to 2.3 amperes.

Think of a battery as a tank of water. One tank's capacity is 2300 gallons and the other is 1600 gallons. (somewhat over simplified, but not to worry)

FYI: Qty 8, 1.2 volt/2300 ma cells connected in series (+ to -, - to +) make up a "battery" of cells that is rated at 9.6 volts with a capacity of 2300 mA. (If the cells were connected in parallel (+ to +, - to -) you would have a battery of cells rated at 1.2 volts with a capacity of 18,400 mA.)

Each detector requires a certain amount of current (at a specific voltage) to operate. If a detector required 9.6 volts to operate and you were using a 2300 milli-amp battery, the detector would only operate for 1 hour. However, it the detector only required 230 milli-amps to operate (realistic), it would operate for 10 hours.

Have I successfully confused you further?
 
Electronics 101 and very useful. I often think we need some very basic electronics somewhere in our educational experiences. It is amazing how much time and money can be saved with at least a fundamental knowledge and a good multimeter with a little skill in using one. I guess the primary fear is a little knowledge and we will make an ash out of ourselves. Ha ha, good post.

HH, Cody
 
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