1.5v to 5v step up converter.

Hello,

I'm going to be using the converter list below. How do I calculate the power that is going to be lost... if my 1.5v batterie is 2000mah how much mah will there be left when stepped up to 5v?

Thanks!

You didn't list a converter, but one might guess that it operates at 80% efficiency. If so, 2000 mAh at 1.5 V = 3 watt-hours input, would result in 2.4 watt-hours output, or about 480 mAh @ 5V.

You can't calculate it as they haven't provided specs... 80% is unlikely for such a
tiny little converter at 4x boost, expect perhaps 60% efficiency at full power (note
this can only provide upto 100mA at 5V).

And your battery won't be 2000mAh probably as that's the manufacturer's
FUD, assuming a 10hour discharge rate at the optimum temperature immediately
after overcharging... Call it 1200mAh and then you'll get a more realistic figure
for its performance after a few dozen charge/discharge cycles.