Estimation question

What is the total addressable market (TAM) for a new battery technology in the US market?

Practice this question out loud. An AI interviewer asks it, follows up like a real interviewer would, and scores your answer. Type or speak.

What this question tests

Structured market sizing for a broad, ambiguous product category, forcing a scoping decision.

Clarify scope: consumer batteries, EV batteries, or grid storage; pick EV and grid storage as the largest and state that choice.
Estimate EV demand: roughly 1.4 million EVs sold in the US annually, times an average 70 kWh pack, times roughly 100 dollars per kWh, equals roughly 9.8 billion dollars.
Estimate grid storage demand: roughly 10 GWh of new grid storage deployed annually, times roughly 150 dollars per kWh, equals roughly 1.5 billion dollars.
Sum the segments: roughly 11 to 12 billion dollars combined annual US market for new battery technology.
Sanity check against known industry reports suggesting the US battery market is in the tens of billions and growing quickly.
State the estimate as a range, not a single number, given the volatility of EV adoption rates.

Explicitly scopes an ambiguous prompt instead of guessing silently.
Uses round, labeled assumptions, 1.4 million EVs and 100 dollars per kWh, rather than false precision.
Breaks the estimate into two segments, EV and grid, instead of one blended guess.
Gives a final range and flags the estimate's biggest sensitivity, EV adoption rate.

Not scoping which battery market is meant, leading to a meaningless number.
Ignoring that cell prices per kWh change quickly, making static assumptions risky.

Chapters of the AI PM course that teach what this question tests.