and can u tell me how can i charge 2 9 volt batterys which are connected in series like in this picture, i dont want to use any DPDT SPDT dpST SPST switch to use, i want that when i connect a 9 volt charger to the circuit or batterys it starts charging both of batterys simultaneously and also gives a beep that batterys are charging, yes i would use 8951 if it is required