Step-up converter current limit 2A
Read the specifications in the datasheet. If the booster came without a datasheet, then you're on your own, and you'll have to measure it.

One of the limitations of a step-up booster is the maximum input current. If you want to achieve a high output voltage with a low input voltage (a high boost ratio), the input current would be many times the output current. Under these conditions, it would be reasonable for a general purpose booster to produce a lower output current than it could with a lower boost ratio. With luck, a booster that does this would safely limit the output to maintain the input current within bounds.

To use some numbers. Consider running the device from (say) 5v to generate either 6v or 24v. The maximum output current of 2A will occur at the lowest output voltage, 6v. With the same input current, the output will only be 500mA at 24v. Now as a manufacturer, do you limit the output over the entire range to 500mA, or do you allow the more useful behaviour of letting the output current rise at lower output voltages?