Lithium Ion Battery Packs

Range overview by voltage class

This page is the range hub for lithium ion battery packs built by our factory: single-cell packs, standard voltage classes, and custom builds from the same cells and the same production lines. Whether you need a 3.6V pack for a handheld device or a 51.2V unit for storage, the range is organised by voltage class so you can start from the closest standard and move from there.

Single-cell packs sit at 3.6V and are built around one 18650 or 21700 cell. These suit compact devices where the pack is a direct energy source rather than a system component, and they are the simplest entry point into the range.

The 12V class covers the widest spread of standard formats, including LiFePO4 12V series packs. These are common in equipment that expects a lead-acid-style voltage but wants lithium chemistry. Our 12V lithium battery packs page lists the standard formats in this class together with the cell types behind them.

The 24V class serves equipment that needs more voltage than 12V can deliver without stacking, and LiFePO4 24V series packs are part of this group. The 24V lithium battery packs page covers the configurations available as standard.

At 36V and 48V, packs move into power-oriented territory — mobility equipment, tools, and systems where current draw is higher and pack construction matters as much as cell choice. These are the li ion power battery pack classes, and 48V is the most requested voltage for new designs. See the 48V lithium battery packs page for the standard range.

Storage units sit at 51.2V and are built as LiFePO4 systems rather than device packs. They are specified differently from the smaller classes, and the conversation usually starts with the load profile and the installation space.

Every class is built from 18650 or 21700 cells. If your device sits between classes, or your volume does not justify a fully custom design, a modified standard pack is usually the fastest route. The custom battery packs page explains how a build is specified when no standard format fits.

Standard packs vs custom builds

A standard pack is a released configuration: fixed cell type, fixed series and parallel count, fixed housing. It is the right starting point when your voltage and capacity requirements land close to an existing format, because the design work is already done and the pack can be quoted against a known specification.

A custom build starts from your device instead. Series count sets the pack voltage, parallel count sets capacity, and both are checked against the current profile and the physical space before the specification is written. Enclosure, connection method and mounting all follow from that review.

The line between the two is not fixed. Many projects begin with a standard pack and change connectors, lead lengths or housing details — that is a modification, not a new design, and it keeps most of the standard pack's released status. Projects that need a different cell, a different series/parallel arrangement or a new enclosure move into custom territory.

For procurement, the practical question is volume and repeatability. Standard packs and modified standard packs suit recurring orders of a proven format. Custom builds suit new devices or designs where the pack is part of the product architecture, and they are quoted project by project. If you are unsure which side your requirement falls on, ask about a standard pack and describe the device — the answer usually comes down to how far your voltage, capacity and space requirements sit from an existing format.

Connectors, leads and housing modifications

Standard packs can be modified with customer connectors, lead lengths and housings. These three changes cover most of the requests that come in against the standard range, and they can be combined on a single pack.

Connectors are matched to what your device already uses, so the pack arrives ready to plug in rather than needing an adapter harness on your line. Lead length is set to your routing: long enough to reach the connector position without surplus cable that has to be managed inside the enclosure.

Housing modifications cover mounting points, entry direction for leads, and the shape of the enclosure where it interfaces with your product. A standard housing that fits the electrical requirements but not the mechanical space is a common reason projects move from standard to modified, and it is a smaller step than a full custom design.

Modifications are confirmed in the project specification, and not every standard model carries every option. The cell configuration, voltage class and capacity of the base pack stay as released; the changes sit around it. This keeps the electrical behaviour predictable while adapting the pack to your assembly.

Charger matching sits alongside these modifications. Charger matching is confirmed per model, so if you are ordering a li ion battery pack charger together with the packs, tell us the pack model and the charger requirement is checked against it rather than assumed.

Charging and shipping documents

Charging and shipping are the two points where a lithium battery pack order most often stalls, so both are handled as part of the specification rather than after it.

On charging, every pack in the range has a matching charger requirement, and that match is confirmed per model. The charger's voltage and current must suit the pack's configuration; a charger that fits one voltage class does not carry across to another. When you order packs and chargers together, the pairing is confirmed at quotation.

On shipping, lithium packs move under dangerous-goods rules, which apply to the rechargeable lithium battery pack regardless of size or class. UN38.3, IEC 62133 and MSDS documents can be confirmed and provided for specific models — tell us the model you are buying and we will confirm which documents cover it. This applies to standard packs, modified standard packs and custom builds alike.

For bulk supply, orders are project-based. That means the commercial terms, document set and shipping arrangements are agreed per project rather than set by a catalogue price list. Bring the model, the quantity and the destination into the first conversation, and the document question can be settled alongside the quotation.

Frequently Asked Questions

What voltage and capacity ranges do your standard packs cover?

Standard packs span single-cell 3.6V packs and the 12V, 24V, 36V and 48V classes, built from 18650 and 21700 cells. LiFePO4 lines cover 12V and 24V series and 51.2V storage units. Capacity is set model by model through the series and parallel configuration, and each standard model's capacity is listed on its product page — the 18650, 21700 and 12V lithium ranges link to them. Or give us your voltage and capacity target and the space available, and we confirm the closest standard format.

Can standard packs be modified with our connectors and leads?

Yes. Standard packs can be modified with customer connectors, lead lengths and housings. These changes adapt a released configuration to your device without redesigning the electrical side, which keeps voltage and capacity as specified. Options are confirmed in the project specification, and not every model carries every option, so send the connector type, lead length and housing requirements with the pack model you are considering.

What documents are available for shipping lithium packs?

UN38.3, IEC 62133 and MSDS documents can be confirmed and provided for specific models. Tell us the model you are buying and we will confirm which documents cover it. Lithium packs ship under dangerous-goods rules, so the document set is agreed as part of the order rather than assumed, and for bulk project-based supply it is settled alongside the commercial terms.