I have a 7.2v 4xxxmAh battery and was wondering if i can charge it using this charger:
The charger usualy charges the typical toy battery (9.6v 1800mah)

here is my battery

this is the board where it plugs in (the red and black wires go to + and - and the two white go to an blue ceramic capacitor of sorts?

then the red wire goes into this black thing and comes out into the cells

heres the wierd blue thing

so i presume i leave the blue thing out and just connect the battery (red+black) to the charger?
what does the black thing do?