What is the best way to power 3 chicklets?
The only way to power chicklets
<R106> Devices connected to the joystick ports of the Operator Interface via a FIRST-approved USB adapter (the only approved USB adapter is IFI Part Number USB-CHICKLET) are excluded from Rule <R105>. If used, this USB adapter must be powered with a 7.2V battery functionally identical to the back-up battery. Power from the competition port or any other source shall not be used to power the USB adapter. The USB adapter must be positioned within the OPERATOR CONSOLE so that the indicator lights may be seen during inspection and operation in a MATCH.
Last year we powered 2 chicklets using a Vex 2A/Hr battery and a y adapter.
We changed it only at the end of the day and it was barely drawn down while supporting a Logitech 3D Joystick and Gamepad simultaneously.
Unless your devices have some sort of active feedback you should see the same performance out of the Vex battery as well.
BTW we did plug and unplug the OI immediately before and after matches and practice sessions.