Physical fit
Diameter, height, pack shape and terminal placement decide whether the battery physically seats and makes contact.
Electrical match
Nominal voltage, full-charge voltage, polarity and chemistry decide whether the device receives the intended electrical system.
Application fit
Drain profile, pulse behavior, temperature range and manufacturer approval decide whether a physically and electrically close cell belongs in the application.
Decision boundary
This guide narrows a battery decision but does not override the device manufacturer’s current manual or safety instructions.
Sources
- International Electrotechnical Commission — IEC 60086-1:2026 — Primary batteries, general requirements
Primary-battery nomenclature, form, fit, function, terminal and electrochemical-system framework.
- Energizer — Battery Replacement Guide
Cross-reference codes and manufacturer guidance to replace the same size and type together.