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Re: my battery will not charge in charger
The charge adapter may be faulty. OR If therecharageable battery is more than 3 - 4 years old then the battery could be worn out.Rechargeable batteries have a finite number of charge and discharge cycles andwill lose their charge capacity over time, i.e. won't charge to 100% andgradually the charge reduces until the battery won't charge up at all. OR Thebattery shows a 100% charge but when the adapter is disconnected the batterydrops off to zero capacity in a very short time. If the battery drops to anunacceptable charge level then the battery needs to be replaced.
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Check your charger and battery contacts. Cleaning battery contacts on the radio and charger with a pencil eraser will remove dust, dirt, debris, and hand oil which may cause the battery to charge poorly. Secondly, you might want to check that your charger itself is working properly. If you have a second known good radio you might try charging it on the same charger.
Bruce, you didn't provide a lot of information but I can tell you that the few times this has ever happened on my Nikon D-90, the battery did not charge, would not charge and I had to throw it away, or it was a charger problem.
I've had it happen when I tried to charge it on my corded Nikon Charger and I never got a charging complete indication after charging over night. When I put it in the camera, the camera indicated it was not charged even though the charger indicated it was charging. But, when I put it on a travel charger, it charged in about an hour and worked fine. The next time I put it on the Nikon charger, it worked fine.
I suggest you verify that the battery is good and charged or capable of charging. If it is, then check to make sure the battery contacts are clean both on the battery and in the camera.
If the contacts are clean and you're sure the battery is good and charged, I'd say the next step is to contact Canon. I've heard their customer service is very good.
Sometimes when a battery is too low it takes a while for it to initialize in a charger and begin to charge. Clean the battery contacts with a pencil eraser and put it back on the charger. Leave it on the charger despite the blinking light. Leave it on the charger for several hours and see if the flash stops and it becomes a constant light indicating normal charging. If this does not work, you may have a short in the battery or in the charger itself. Try another known good battery in the charger and see if you have the same problem. If so the charger has an issue. Best regards.
Rechargeable batteries don't last forever. This one may have simply stopped working.
However, it is worthwhile checking that the contacts on both battery and charger are clean. Dirt or corrosion can prevent the battery from charging.
There is also the possibility that the charger has failed. You can buy a new battery and try charging it. If it charges, then the charger is good and the old battery was the problem. If it doesn't, then you must get a replacement charger, and you will have a spare battery, which is no bad thing.
The problem is your batteries are either over heating or worn out. You might also have a problem with the charger but you'll need Dewalt tech support to determine if it's good or bad.
The first thing to do is clean the contacts. Use a white plastic pencil eraser and clean all the contacts you can reach. If there are any contact you can reach with the eraser use a Q-tip that is just damp (not wet) with rubbing alcohol to clean them.
Discharge your batteries completely then put them in the freezer for 8-24 hours. Take the batteries out of the freezer and let the set 24-48 hours after that put them on the charger, they'll either charge or you need new batteries (more likely) or a charger.
Clean your battery contacts on the battery and charger with a pencil eraser to assure good contact. Flashing red or flashing in general usually is the sign of a too low to charge battery, a shorted battery or a bad connection. In some instances, a battery will begin to charge once left on the flashing charger for an hour or so. Try this and see if the light becomes constant. If so, it is charging. If it still flashes, replace the battery.
I had this problem a few weeks ago (i.e. flashing red LED). All I did was remove the power plug from the charging unit, turned it around 180 degrees, then plugged it back into the charging unit. Red LED came on steady & the battery (which is the one that came with the camera) recharged as normal.