Battery guides

Short technical guides for decisions that a cross-reference row cannot explain.

How to read a button-cell code

Decode chemistry letters, diameter and height without assuming that every printed number is an exact equivalent.

Two button cells can occupy the same case while delivering different voltage behavior and useful life.

The two cells share nominal dimensions but differ materially in voltage, chemistry and charging system.

Use clean calipers to narrow the catalog, then confirm the marking, voltage and terminal layout.

Understand why IEC, ANSI and manufacturer codes can describe the same battery from different directions.

Drain suffixes separate high-drain and low-drain silver-oxide applications even when the case is identical.

CR and BR cells can share voltage and dimensions while using different cathode chemistry and discharge behavior.

Use the size number and chemistry together; tab colors help identify 10, 13, 312 and 675 cells.

A rechargeable cell can fit a primary-battery compartment while presenting a different nominal or full-charge voltage.

Compatibility requires form, fit and electrical function—not merely a battery that enters the compartment.

Keep small batteries secured, separated from conductive objects and inaccessible to children.

Isolate the device, avoid skin and eye contact and follow the battery maker’s handling guidance.

Old and new cells or mixed chemistries can discharge unevenly and increase leakage or rupture risk.

Low temperature can reduce available voltage and runtime even when the battery is not empty.

Wireless bursts, motors and backlights can reveal limits that a simple capacity number hides.

Camera batteries combine voltage, external shape and terminal layout; a code-only near match is not enough.

Secure terminals, keep chemistries identified and use the collection route required in your location.

Separate nominal values from test conditions, limits and application-specific discharge curves.