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09-05-2013, 04:23 PM   #1
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K5 Battery Charger D-BC90 green led blinks

Have been using it with 3 batteries for over a year and now the green led blinks with one of the 3 batteries discharged. Has anyone else had this happen? Checked on web and found nothing.

Thanks, Earl

09-05-2013, 04:29 PM   #2
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If it is only one of the batteries, the probability is it is the battery that is shot and not the charger.

LiON batteries do wear out. They are rated for a specific number of full recharges, but that is a target and not an absolute number. Sounds like this one is pretty much dead. Toss and replace.
09-05-2013, 05:49 PM - 1 Like   #3
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Don't toss, take to hazardous recycling spot. Best buy takes them.
09-05-2013, 06:34 PM   #4
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QuoteOriginally posted by crewl1 Quote
Don't toss, take to hazardous recycling spot. Best buy takes them.
Good response.

09-06-2013, 01:42 AM   #5
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It is possible to discharge a battery so low that the charger simply 'sees' it as dead.

I use a method to partially revitalise a battery enough for the charger to 'see' it again using a standard 9v battery connected + to - and - to +, held in place for 10 seconds, repeated a few times if necessary.

Has resulted in me being able to re-charge apparently dead batteries, some of which are still going strong some time later.

The method is well documented out there on the internet.
09-06-2013, 02:35 AM   #6
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Thanks to all. Will try the 9v battery method.
Earl
09-06-2013, 04:20 AM   #7
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QuoteOriginally posted by merengue Quote
Thanks to all. Will try the 9v battery method.
Earl
Make sure you wear eye protection and hand protection.
09-06-2013, 11:54 AM   #8
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QuoteOriginally posted by merengue Quote
Have been using it with 3 batteries for over a year and now the green led blinks with one of the 3 batteries discharged. Has anyone else had this happen? Checked on web and found nothing.
Thanks, Earl
Hello Earl, I had the same problem with one of my K-5 batteries. I cleaned the terminals with a Q-tip dipped in Surgical Spirit. For good measure I cleaned the charger contacts.
Eureka, the battery stsrted charging pretty fine.
I think some kind of an oxidized film builds up on the terminals over time.
Using a 9-volt battery to shock charge a bad cell is also a good idea. In fact you can use double the volts - in this case 15 volts - to shock the cell out of slumber.
Regards

04-18-2014, 12:21 PM   #9
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I have a brand new never charged battery doing this - blinking green light on the charger.

Edit:

Nevermind -- it finally went solid green. I do not recall any other fresh battery doing that.

Last edited by sadatoni; 04-18-2014 at 12:28 PM. Reason: addendum
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