Custom 18650 / 21700 Battery Packs

Choose a cell, set your series × parallel combination, and the pack drawing, voltage and capacity update live. When it looks right, send it straight to the inquiry form.

Cell type
Chemistry

1–20S. Sets voltage.

1–12P. Sets capacity.

Per-cell rating.

Pack 3S2P 18650

Cell layout shown is a flat single-layer grid for illustration — the final arrangement (stacked layers, offset rows, holder vs. shrink-wrap) is engineered to your enclosure. Dimensions and weight are estimates for a shrink-wrapped pack incl. BMS and nickel strips.

Popular configurations

Not sure where to start? These are the series × parallel combinations we build most often — dial in your own version with the configurator above.

Custom 18650 battery pack configurations: 1S3P 3.7V, 2S3P and 2S4P and 2S7P 7.4V, 3S1P 11.1V, 4S1P 14.8V, 5S2P 18.5V, with custom connectors, optional BMS PCM and custom case options

Packs we’ve built

Shrink-wrapped 18650 packs from recent OEM orders — nickel-strip welded, PCM protected, wired and connectorized to spec.

Custom 18650 battery pack, parallel cells in blue shrink wrap with JST connector
Side-by-side parallel packBlue PVC shrink wrap, JST lead-out
Custom 18650 lithium battery pack with wire leads and connector
Compact 2-cell packCustom wire length and connector
Multi-cell custom 18650 battery pack for OEM device, shrink wrapped
Multi-cell configurationHigher capacity S×P build
18650 battery pack with PCM protection board and output wires
PCM protected packProtection board integrated before wrap

Request a quote

Your configured spec is attached below — add anything else we should know (discharge profile, enclosure limits, certifications) and we’ll reply within one business day.