MacBook Pro Charging Issues

Last night I plugged in my MacBook Pro, and I noticed the light on the charger was a very faint green, hardly visible in bright light.

Today I opened my Mac and noticed it stated 'batteries not available.' Reading forum posts online I decided to reset the SMC, so I turned it off, pressed the required key combination for the reset and then tried to turn it on. The Mac won't power on. I've tried multiple chargers.

Since the problem isn't the charger - try wiping down the magsafe contacts on your Mac with a medical alcohol pad, if they get too dirty it won't charge. I had a similar issue (green light while discharging) and cleaning the contacts improved the connection for a few days till I could replace the charger.