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

Customization & factory

Every pack is built to order — connectors, protection boards, casing and wiring are all specified by you, and assembled on our own production lines.

Customizable connectors for 18650 battery packs: XT60, JST, SM, Tamiya, EC8 and more, plus custom protection circuit boards
Connectors & PCBs15+ plug types, custom protection boards from 3.7 V to 36 V
Customizable battery pack casings: plastic and metal enclosures in various shapes and colors for 18650 packs
Custom casingsPlastic or metal enclosures shaped to your device
Battery pack factory: assembly lines, spot welding equipment and warehouse for 18650 pack production
In-house productionAssembly lines, spot welding and testing equipment
18650 battery pack applications: microphones, vacuum cleaners, heaters, radios and massage guns
Typical applicationsAudio gear, home appliances, personal care devices

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.