For an OEM project, the choice between an NCM (nickel manganese cobalt oxide) and a LiFePO4 (LFP) lithium-ion battery pack is not a one-line answer. Cell chemistry affects the pack's voltage architecture, energy density and design trade-offs, but actual performance depends on the selected cells, battery management system (BMS), enclosure, load and operating conditions. Start with the equipment requirements and ask suppliers to compare designs against the same duty cycle.
Before choosing a cell, define the available space and mass, required runtime, continuous and peak load, charging method, operating and storage temperatures, service life target, production volume and destination markets. A compact handheld product may prioritize space and weight. Equipment with more installation room and frequent cycling may prioritize a different balance. Neither example replaces testing in the finished product.
| Design question | What to compare | What to request from the supplier |
|---|---|---|
| Space and weight | NCM cells can offer higher energy density; an LFP design may need more room for the same energy target. Pack-level results also depend on packaging. | Dimensioned drawings, mass and usable energy for each complete pack proposal. |
| Voltage and charger | The chemistries have different cell-voltage profiles. The same marketing voltage does not mean the charger or electronics are interchangeable. | Series/parallel configuration, operating voltage window, maximum charge voltage and charger compatibility. |
| Load and runtime | Capacity in amp-hours alone does not establish runtime under the equipment's real current profile. | Usable energy and discharge data at representative continuous and peak loads. |
| Life and operating conditions | Cycle life depends on depth of discharge, charge rate, temperature and the test's end-of-life definition. | Test conditions and acceptance criteria, not an isolated cycle-life headline. |
| Protection and integration | Either chemistry needs a pack-specific protection and charging design. | BMS functions, temperature sensing, connector pinout, mounting and service approach. |
The qualitative energy-density trade-off is discussed in a National Renewable Energy Laboratory comparison. The US Department of Energy lithium-ion technology assessment also describes how chemistry and cell design affect performance. These are general references; the proposed pack must still be validated for your application.
List the equipment's minimum and maximum input voltage, startup behavior and charger output. Ask the supplier for the complete pack voltage window and cutoff settings. A nominal-voltage match is not sufficient to approve a chemistry change.
State the desired runtime, average load, peak load duration and test temperature. Ask for a runtime estimate using those conditions and then verify it in a prototype. State whether the capacity figure is measured at cell or finished-pack level.
Motor starting, heating elements and communication transmitters can create short load peaks. Give their magnitude and duration, plus any charging-while-operating requirement. The cells, BMS, wiring and connector must all be selected for the electrical profile.
Provide a drawing or 3D envelope, mounting points, cable exit, connector model and pinout. Include vibration, moisture exposure, ventilation and the ambient-temperature range. A pack that fits on paper can still fail at the connector or installation stage.
Confirm charger type, charge time target, temperature sensing and expected protection behavior. Ask what drawings, cell specifications, prototype test results and transport or destination-market documents can be provided. Requirements depend on the final product and where it will be shipped, so agree on the applicable documentation before tooling or production.
For a copyable list of information to send suppliers, use our custom battery pack RFQ checklist. You can also review our custom NCM lithium battery pack examples and wider battery pack range.
Not automatically. The cell-voltage profile, series count, charge limits, BMS settings and physical design may differ. Confirm compatibility with the equipment and charger, then validate a prototype.
There is no useful answer without a defined cell, cycle test, temperature, depth of discharge and end-of-life threshold. Ask each supplier for results under comparable conditions relevant to your equipment.
Send the equipment application, voltage range, current profile, runtime target, available dimensions, connector and charger details, operating temperatures, forecast quantity and destination market. Contact Surlon Power with these details to discuss a pack configuration and prototype plan.
