I have a aa and aaa battery charger's and all three are ful with batteries and are flashing red. What does this mean?

I doubt you could fit three AAA batteries inside the camera. Chargers aren't that expensive if you know where to look. Take a look here for some examples.

Yes. The charger will charge any brand of NiMH batteries.

http://www.farnell.com/datasheets/9610.pdf explains the indicator lights

The flashing red probably means that the charger is working correctly and is indeed charging the batteries. The light should turn green when charging is complete after anything from 1 to 16 hours depending on how this charger works.

Do the following test: Fit the charger with your batteries and connect it to the mains. After 1 hour check if there is a detectable temperature rise in the batteries. You can do this without interrupting the charge cycle by touching the cells with the back of your fingers. If the temperature is still low, let it continue for another 15 hours or so, checking every now & then for any temperature increase. Should the temperature rise more than a few degrees, then stop the charging by removing the charger from the mains. Should the red lamp remain flashing after 16 hours, then I suspect you to have a defective charger.

I have this issue with one of the batteries in my set. (Purchased last summer). It is a PL-7522

It seams to be the battery, as I have tried combination of charging ports and controllers. The other battery seams fine.

I had the same problem with flashing red lights. Both sides on a four battery charger. I swapped the batteries to another charger and the batteries were fine. They charged normally. I put some different batteries in the charger and the same flashing light situation. Those batteries also charged normally in a different charger. I looked closely at the back of the charger and, low and behold, "made in China". Why does that not surprise me. The bottom line, it may not be a battery issue.

Please refer to your charger user manual: but in general, this indicates that the charger has determined that one or more of your rechargeable is faulty (despite the fact that it may still hold a partial charge).
Smart charger can measure the expected voltage and current flow and will prevent any 'faulty' cells to be charged (those 'faulty' rechargeable batteries may actually still be useful and charged on other less intelligent charger). Try charging them individually (if your charger can handle individual battery) or in different pair combination to locate flaw cell.
Hope it helps.

When the batteries are charged fully the light should be green.

on my charger the red lights are only to tell there is power connecting especially when you have two battery's behind each other on the bottom of my charger there is a guide as to how long you should charge each battery as to size which are aaa 7hours max
aa 24hours
c 24hours
d 24hours
9v 24hours
hope this helps glenn............