Don't worry about overcharging it. You can try one of several different apps that will do this for you. Liteflow from maket (lite free version) is nice

 

Or rather you're too intelligent for the app

Lightflow has some settings that are crucial to it working right. iirc they are all there within the app and explain it fairly well. You could always try going to the developers website for support and see what you can find.

 

Pull out the charging cord, plug it back in when the screen is off, it should work then.

 

Make sure the screen is off...

 

I tried light flow for the charge notification light, I couldn't get it to work either.
I unplugged it and plugged it back in, I rebooted, I enabled it in accessibility, nothing.

 

When the phone is powered Off, there is an animated charge indicator that is displayed when you connect the phone to the charger. To check for a full charge, tap the power button; you'll see a full batt symbol when it's done.

I assume this is what the OP was talking about.

 

I'm assuming the OP is looking for an indication from the LED without turning on the screen.
I had battmon X on my Droid X. I had it set to have the LED always on and green while charging, and always on and white when charged.
Light flow isn't doing that and battmon X doesn't work on the Nexus for this purpose.

 

Are your screens off? Light flow works for me. It does not work if the screen is on and charging.

Turn the screen off and the led should come on. Unplug and replug with screen off

 

Already tried that. I will try again.

 

It's working this time. I've tried it on 3 other separate occassions and it did not work.

 

My guess is that you were playing with Light Flow while the phone was plugged in. I can't confirm this, but from my testing I've concluded that for Light Flow to activate, it needs to sense a change in state of the phone AFTER you make the changes and exit the app.

Example:
Phone is plugged in. Open Light Flow. Tell Light Flow to flash orange LED while plugged in. Exit Light Flow. Turn screen off. Phone is still plugged in but LED will NOT flash because the "state" of the phone (plugged in vs. unplugged) has not changed - it has been plugged in the the entire time.

Phone is unplugged. Open Light Flow. Tell Light Flow to flash orange LED while plugged in. Exit Light Flow. Plug phone in. Turn screen off. LED should now flash because Light Flow has been able to detect that the phone changed from the unplugged state to the plugged in state.