Ok, I'm officially dumb.
I got me a few PCCs for 808/901 batteries similar to this:
The only difference is it's got a nice little LCD with a battery charge indicator.
If I just connect a battery, nothing happens.
If I press the button, the led lights up green and shows the bat charge.
If I press and hold, led starts blinking and goes red, if a ecig batt is connected the led on the battery blinks a few times and then all light and the lcd go out.
I'm guessing it's charging, right?
My old one had 2 leds and would start charging immediately and would light up green when the battery was full.
I got me a few PCCs for 808/901 batteries similar to this:

The only difference is it's got a nice little LCD with a battery charge indicator.
If I just connect a battery, nothing happens.
If I press the button, the led lights up green and shows the bat charge.
If I press and hold, led starts blinking and goes red, if a ecig batt is connected the led on the battery blinks a few times and then all light and the lcd go out.
I'm guessing it's charging, right?
My old one had 2 leds and would start charging immediately and would light up green when the battery was full.