Is the green light supposed to flash with no battery in the charger I have porter-cable mod 884

That particular battery is defective and falsely indicating it is charged.

It is not q cost effective repair. I understand your wanting to repair it. I have disposed of several 18V tools because of the cost of replacement batteries. I found it a better solution to watch for sale and buy a new tool with 2 batteries and charger. Good Luck.

Please try this:
1) Make sure camera is OFF.
2) Plug Charger into the wall (not into camera)
3) Last think plug charger into the camera

The battery is defective.

go to www.dewaltservicenet.com and enter the model number of your drill. It will get you to the parts breakdown and will tell you if there is a charger available from the factory. Or call 1-800-433-9258 1-800-4DEWALT. stanley black and decker owns all of them so yes that's the right place!

im havingg the same problem have tried three chargers and four batteries with same result.

How old is the battery and do you store it in the cold. Cold is no good for the batterys but if its flashing that its trying to change and the problem may be with the charger if there not more then 3or 4 years old and were not left in cold conditions and the lithium battery haven't been out for much longer then that. Ihave the same gun and for a year its worked vary well with the 7 inch saw and i use them a lot.

Porter Cable has not offered a replacement for their poorly designed 19.2V chargers. I had the same problem and happen to like my drill and circular saw. I found a universal charger called a model number CHUN-2420. Google it--I got mine for $27 plus shipping. All you need to do to make this work is splice 3 wires.

My charger is a PC model 8624, so the instructions might vary slightly between the chargers. Remove the six screws on the bottom of your PC charger. Remove the bottom section. Remove the screw(s) that attach the circuit card to the plastic housing. Disconnect the 3 pin white charging connector from the circuit card, and cutoff the connector. Discard the circuit card and power cord. Cut the 3 conductor (red/yellow/black) cable coming out of the Chun-2420 approximately 2' from the charger. Splice these three wires to the three wires in the charger housing that connect to your battery. In my situation, Red/Red, Yellow/Yellow, White/Black. To verify, red=positive, black/white=negative, yellow=temperature sensor. Wrap the red/yellow/black cable with electrical tape where it exits the PC charger through the power cord hole. Re-attach the bottom.

hey
flashing orange=cooling abnormality.
you need to wait for the battery to cool.

see my mod page, it has all light explanations in it.
Have fun
Avi

Most chucks have a tolerance the cordless drills where designed for drill bits 1/8 and larger the 3/8 chucks are a little better with the smaller bits .Check your owners manual and see if they have a min requirement listed for the bit size