Hi guys, I just got a Fatshark battery for my Headplay, and found this charger. Supposedly the silver button is a stop/start, but it does two different things. The four leds either flash red green red green constantly, or I push the button and red flashes off and on and it chirps each time. Anybody familiar with this charger? Would I be better off just using the charger that came with the Headplay? As always, TIA for any help.