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Old September 2nd, 2008, 02:23   #1
KillerCreed
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Battery Charging

I have an 8.4V Mini 1500mah NIMH battery that I use for my SCAR at the moment. I was told bymy local custom battery making outlet name Prairie Battery. I brought my my charger to them a while back, and they told me that it will take 1.5 hrs to charge my battery.

Is there an actual formula that I can use to determine the amount of time it will take for me batteries to actually charge w/o out be asking them everytime?

Since I will be eventually getting 2x 8.4V Large 4500mah NIMH in the next while for my M4 Project that has finally begun to start.


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Old September 2nd, 2008, 02:37   #2
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Divide the battery capacity by the current of the charger to get the hours needed for charge. i.e. 1500mah batt and 500ma charger = 3 hour charge.
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Old September 2nd, 2008, 02:56   #3
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it's that easy?
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Old September 2nd, 2008, 02:58   #4
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simple math transpotion!
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Old September 2nd, 2008, 03:04   #5
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How do I find out my chargers charge speed if I can't find th info on it or should it be on it eventhough I looked?
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Old September 2nd, 2008, 03:06   #6
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did it not come with a booklet? Which brand and model is your charger?
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Old September 2nd, 2008, 03:13   #7
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No Booklet came with it. I bought it from Ken 2 yrs back along with my M4.

Super Thermal Protected BC-725A NIMH/NICD Battery Charger

Also, says, " FAST CHARGING TIME 30-90MINS"

Last edited by KillerCreed; September 2nd, 2008 at 03:15..
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Old September 2nd, 2008, 03:17   #8
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So it's just a dumb charger? Or is it a smart charger with peak detection?
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Old September 2nd, 2008, 03:18   #9
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Quote:
Originally Posted by Styrak View Post
So it's just a dumb charger? Or is it a smart charger with peak detection?
NO IDEA
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Old September 2nd, 2008, 03:20   #10
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Well....look at it. Does it have an LCD screen and/or buttons and settings you can change?

Or is it just a block with a plug?

EDIT: Just looked it up. Looks like a dumb charger.

To find out your charger's speed look at the back of the charger for output. It should say XXXmA
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Last edited by Styrak; September 2nd, 2008 at 03:24..
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Old September 2nd, 2008, 03:24   #11
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10W and no to LCD. So, yes to dumb charger
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Old September 2nd, 2008, 03:26   #12
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so that means its charging at .083A or 83 mA according to ohms law.
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Old September 2nd, 2008, 03:29   #13
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hope not. Could the BC-725A be referring to the chargers output?
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Old September 2nd, 2008, 03:35   #14
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there is no possible way that it puts out 725 amps.
is this your charger?
http://www.wgcshop.com/pcart/shopper...%20Dischargers
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Old September 2nd, 2008, 03:36   #15
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YES
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