powered

[ pou-erd ]

/ ˈpaʊ ərd /

(of a machine, vehicle, etc.) having a specified fuel or prime mover: a gasoline-powered engine; an engine-powered pump.

Origin of powered

First recorded in 1875–80; power + -ed²

non·pow·ered, adjective self-pow·ered, adjective un·der·pow·ered, adjective

However, if you have an underpowered stove, especially an electric one, consider a smaller size.

The 2012 Holiday Kitchen Gift Guide |Megan McArdle |December 13, 2012 |DAILY BEAST
Despite an economy as underpowered as a cheap flourescent light, Mitt Romney somehow failed to unseat Barack Obama.

How Can the Republicans Take Back the Majority? |Megan McArdle |November 9, 2012 |DAILY BEAST
They flew in a rickety, underpowered biplane and carried just $25 in their pockets.

Red Tails Overlooks the Story of America’s First Black Pilots |Marc Wortman |January 16, 2012 |DAILY BEAST
He tended to fume when his underpowered car noticeably slowed up on grades, and especially the long ones.

Operation Terror |William Fitzgerald Jenkins

Amongst those are two good "Shorts," but the others are no use, they say, being wrong type and underpowered.

Gallipoli Diary, Volume I |Ian Hamilton

underpowered

/ (ˌʌndəˈpaʊəd) /

lacking or low in power two-litre cars are underpowered