Senior Cell Engineer - Cell Technology
Posted Aug 17, 2026 · We last checked this listing on Oct 6, 2026
Likely interview questions for this role
Written from this job description, not a generic list. Each one notes what the interviewer is really checking.
About your past
Tell me about an experiment that did not go the way you expected. What did you learn from it?
What they are checking: Curiosity and learning from results, which the posting values for this hands-on role.
Tell me about a time you worked with an outside partner, like a university or supplier, on a technical project.
What they are checking: Collaborating with external partners while keeping the work moving and the goals clear.
How do you stay current on battery research, and what recent development has your attention?
What they are checking: Genuine engagement with the field, which matters for a scouting role.
What would you do
A cell supplier shares impressive data on a new cell. How do you decide whether to trust it?
What they are checking: Healthy skepticism and independent verification of supplier claims.
How would you explain a cell chemistry tradeoff to a pack design engineer who is not a chemist?
What they are checking: Translating electrochemistry into design impacts that other engineers can act on.
About the work
How would you scout and screen a new cell chemistry or material for a cordless power tool pack?
What they are checking: A structured evaluation that weighs energy, power, charge rate and cycle life for tool use.
Power tools need high discharge rates. How does that change which cells or materials you would favor?
What they are checking: Understanding the tradeoff between energy density and power capability in cell design.
Walk me through how you would design an experiment to compare two cathode materials.
What they are checking: Sound experimental design with controls, sample sizes and meaningful test conditions.
What causes capacity fade in a lithium-ion cell under fast charging, and how would you test for it?
What they are checking: Real knowledge of degradation mechanisms like lithium plating and how to detect them.
How do you think about safety when testing new cell technologies in the lab?
What they are checking: Respect for thermal runaway risk and the controls needed for safe cell testing.
What data would you look at to judge whether a cell will hold up in a cold jobsite in winter?
What they are checking: Considering low-temperature performance and its impact on real users.
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Practice this out loudThe full job description
As published by Milwaukee Tool.