Battery for gas boat electronics.
I have been using 4 double A energizer batteries in a battery pack to power my 2 large non digital scale servos. 1 throttle standard servo, and rx. Needless to say the batteries drain quickly and it's expensive. I have 9.6v 1600mah and 700mah nimh. And also 7.4v nicad batteries at 1800 mah. And 8.4v nicad batteries at 3000mah. Can any of these power my electronics safely.