Canon 350D's Charger Blinking Red/Green?

What does it mean when my battery charger blinks from red to green and back again?

Do you mean it's continuous blinking or that it is going from red (charging) to green (charged) then back to red. If the later, have you checked to see if the battery is charged after the green has illuminated.

It goes from red (charging) to green (charged) but in a consistent manor.

I left it and checked it about a half hour later, and it was only green, so I guess it's good.

Good news. It was probably at the end of the charge cycle and was settling down.

Here's what I've gathered:
- When the charger is in red => battery is being charged
- When the charger is in green => battery is full charged
- When the charger is blinking red and green => battery is between 90-99% charged

However, I've come across the 3rd situation above and my charger is still blinking red and green after the whole night, even though when my camera indicates that the battery is empty. The only conclusion I can draw is that the battery is near the end of its life.

kenwood33 wrote in post #3512018
Here's what I've gathered:
- When the charger is in red => battery is being charged
- When the charger is in green => battery is full charged
- When the charger is blinking red and green => battery is between 90-99% charged

However, I've come across the 3rd situation above and my charger is still blinking red and green after the whole night, even though when my camera indicates that the battery is empty. The only conclusion I can draw is that the battery is near the end of its life.

Your conclusion sounds about right to me. Grab a new Sterlingtek battery, they are so cheap and they work very very well. I have one.

I had exactly the same situation.

I had two batteries that would hold practically no charge - put them in a charger and after a few minutes the charger would start flashing red/green. I also tried another charger to see if there was something defective with the charger - nope - same result. Neither battery would hold much charge even after an overnight charge. The batteries were about 8 months old.

Both batteries were the generic 3rd party type and both from Sterlingtek. I fired off an email to them, they informed me that the batteries were defective and that I should return them. Couple of weeks later (shipping to Canada) I get a package in the email with two brand new batteries. No ifs or buts, just good old fashioned customer service.

Since I'm paranoid about running out of juice I've since ordered another two...both from Sterlingtek - their reputation is well deserved.

Brhum wrote in post #3516136
I had exactly the same situation.

I had two batteries that would hold practically no charge - put them in a charger and after a few minutes the charger would start flashing red/green. I also tried another charger to see if there was something defective with the charger - nope - same result. Neither battery would hold much charge even after an overnight charge. The batteries were about 8 months old.

Both batteries were the generic 3rd party type and both from Sterlingtek. I fired off an email to them, they informed me that the batteries were defective and that I should return them. Couple of weeks later (shipping to Canada) I get a package in the email with two brand new batteries. No ifs or buts, just good old fashioned customer service.

Since I'm paranoid about running out of juice I've since ordered another two...both from Sterlingtek - their reputation is well deserved.

Well I'm still having the issue, and I dunno what I was thinking when I did this thread, but now that I saw your thread, I think I'll have to give Sterlingtek an email also. Thanks for that.

I faced this behaviour with charger for 450D (LP-E5) with cheap eBay bought battery after few charging cycles. After reading this thread that the battery is faulty, I have opened it, found that one of three (the "-") wires has released from battery's PCB. I have just soldered it back and simply cosed it. And it seems to be working fine now.

So this could be the reason for you also and you do not need to throw it away and buy another one...