How long will the Anker 521 PowerHouse run a wi-fi router / modem?

Q: How long will the Anker 521 PowerHouse run a wi-fi router / modem?

The Anker 521 PowerHouse has 256 Wh (about 196 Wh usable at the outlet, estimated). Running a wi-fi router / modem that draws 15W, it lasts about 13 hours on a single full charge.

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Will the Anker 521 PowerHouse run a wi-fi router / modem?

Yes — the 521 PowerHouse runs a wi-fi router / modem comfortably

Its 200W continuous output easily covers the 15W draw.

Estimated runtime

about 13 hours

on a single full charge

Est. usable (AC): 196 Wh

Appliance draw: 15 W

Continuous output: 200 W

How we calculated this

We start from the Anker 521 PowerHouse's 196 Wh of estimated usable energy at the outlet — its 256 Wh rating, derated for a safe depth of discharge and ~15% inverter loss — then divide by the wi-fi router / modem's 15W draw:

196 Wh ÷ 15 W ≈ 13.1 hours

Real-world runtime varies with temperature, cable losses, and how hard the appliance actually cycles. Treat this as a solid estimate, not a guarantee.

Check 521 PowerHouse price → Full 521 PowerHouse specs →