The FTQ Power Board with 1.5F of stored capacitance provides 20-24V of firing power and up to 10A for each channel with just the single internal battery

With an external USB C power source the firing power is boosted up to 29V and up to 10A for each channel. 

The firing voltage is displayed on the screen to the right of the battery icon. In the following figure, the screen displays 28.7 Volts of firing power

The multiple capacitors on the fireTEK Power Board are charged to half capacitance when in TEST State and take less than 5 seconds to charge to at least 80% when in ARM State or PLAY State.