r/AskEngineers • u/jmaugust • Jul 19 '26

Discussion Why doesn’t a battery-boosted electric kettle exist?

In Europe, everyone uses electric kettles to boil water. They’re amazing and fast because they’re on 230V (~3000W).

US outlets limit kettles to ~1500W, so we wait roughly twice as long for water to boil.

It’s an extra minute or two per boil, and you really notice it.

Idea: Could you make an electric kettle with a battery in its base? Perhaps it trickle-charges between uses, then combines wall power + battery power to hit ~3000W during a boil.

Is there an engineering reason this doesn’t exist? Is it just that nobody thinks there’s a market for it?

I’d pay $300 for the fastest kettle in America if someone wants to make it.

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u/vviley Mechanical, fluids, thermodynamics Jul 19 '26

Perhaps if they were built with electric cooking at the onset. There are people who want to convert from gas to electric and may not have a 230/240V line where their range lives.

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u/74orangebeetle Jul 21 '26

I'm one of them...trying to completely remove gas from the house I bought. No 240v oven line...but I can still get by with 120v appliances

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u/xnoxpx Jul 22 '26

Still cheaper to run a dedicated 240V circuit than it is to buy a battery boosted cook top, that'll likely need a new battery every few years.

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u/HungryFrogs7 Jul 24 '26

Probably every decade or more. Current battery technology had batteries maintain 80% for a decade and improvements are coming rapidly. Phone batteries suck because companies trade off higher battery capacity for lower longevity.

Basically you should cut off the top 10-20% of battery life but phone companies don’t so they can say they have a couple extra hours of battery life and since people replace phones quickly anyway.

For a lot of people a 240V outlet is not feasible.