Cell Match Check Calculator

Are your cells or groups well matched?

Measure each cell or group at rest, after it has sat for a while off charge. Everything is worked out in your browser. Nothing is saved or sent anywhere.

1. Voltages (V), leave unused at 0

2. Results

How it was worked out

    What this does and doesn't tell you

    • Pack rebuilds involve lithium cells that can short, burn or explode. Only work on packs if you have the right knowledge, tools and fire safety in place.
    • There is no single pass mark. Compare against the cell maker's data and look for change over time.
    • Lithium-ion tool packs can short, overheat and catch fire if they're damaged, wired wrongly or charged on the wrong charger. Only use the maker's charger for the pack.
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