***NOTE***: To activate the radio switch hold the OFF button while powering the unit. To deactivate repeat the process
Regarding sizes, The 100 is mostly used in models that require the maximum amount of emergency power. If you’re using powerful servos that consume large amounts of current then this is the one that will give you the most time to land. The larger the size the more time you have to land but all the models will give you plenty for landing for any size helicopter.
Note: Maximum input voltage is 8.2V