Sr Electrical Engineer - Battery
Posted Sep 9, 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 a time you found a safety issue in a design. What did you do?
What they are checking: Willingness to raise safety concerns early and push for a fix.
Tell me about a time you had to reduce cost on a board without hurting safety or performance.
What they are checking: Value engineering judgment that protects safety-critical functions.
What would you do
A pack shows uneven cell voltages after a few hundred cycles. How do you investigate?
What they are checking: Diagnosing balancing, cell mismatch and sensing issues together.
How do you work with cell engineers and mechanical engineers on a new pack?
What they are checking: Cross-team collaboration on a product where cells, electronics and housing all interact.
About the work
Walk me through the key functions of a battery management system in a cordless tool pack.
What they are checking: Solid grasp of cell monitoring, balancing, protection and communication in a pack.
How would you design cell voltage and temperature sensing so the readings stay accurate across the pack's life?
What they are checking: Measurement accuracy and drift awareness in safety-critical sensing.
What protections must a pack have against over-current, short circuit and over-temperature, and how do you test them?
What they are checking: Knowing safety-critical protection design and how to prove it works.
How do you design a battery so it can talk reliably with many different tools and chargers?
What they are checking: Communication protocol design for compatibility across a platform.
How do you think about safety standards and certification when designing pack electronics?
What they are checking: Awareness that standards like UL shape design choices from the start.
How do you keep pack electronics working in a tool that gets dropped, soaked and frozen?
What they are checking: Designing electronics for harsh mechanical and environmental conditions.
How would you minimize standby drain so a pack still has charge after months on a shelf?
What they are checking: Low-power design thinking for real user storage patterns.
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As published by Milwaukee Tool.