25.2V 2Ah Custom NCM Lithium Battery Pack | 18650 7S1P

Seven Series Cells in a 21mm-Thick Pack

Seven 18650 cells connected in series give this custom NCM pack a 25.2V nominal voltage and 2Ah capacity. It provides 50.4Wh of nominal energy in a flat blue-wrapped assembly for equipment designed around a seven-cell lithium-ion supply.

A 132 × 73 × 21mm envelope makes this version a flat pack rather than a tall block. The 368g reference weight and lead routing should be checked against the finished enclosure.

The 7S1P arrangement uses 7 series positions, with one cell at each series position. The reference photographs show red and black leads with two connector housings. The summary does not specify connector part numbers, cable lengths or which connection is assigned to charging. Confirm the complete harness drawing before selecting mating components.

Datasheet Values for 18650-7S1P

The table follows the supplied product parameter summary for this configuration. Dimensions and weight are reference values; request the approved drawing for tolerances and the treatment of leads, connectors and accessories.

Electrical Strengths of the 18650 7S1P Build

• 18650 7S1P configuration. The series and parallel arrangement identifies the intended build; use it together with the voltage and capacity when comparing pack options.
• 2Ah capacity and 50.4Wh nominal energy. Energy is calculated from the listed voltage and capacity. Establish actual runtime at the equipment's average load on a sample.
• A defined charging requirement. The summary lists 29.4V and 1A. Match the charger to this build and confirm termination requirements in the final specification.
• A measured installation envelope. The 132 × 73 × 21mm body and 368g reference weight let the mechanical team review space and support requirements before selecting a sample.

How This Build Differs from Its Siblings

This 7S1P version is a 2Ah, 50.4Wh flat assembly measuring 132 × 73 × 21mm. The 25.2V 9Ah 7S2P pack is a different configuration with a different capacity and physical envelope. Check the specific model rather than choosing on the shared nominal voltage.

Keep the approved cell configuration, drawing and specification revision with the order. Connector functions, protection settings and any changes to the standard build should be documented before production.

Duty, Charge and Temperature Limits

• Charging. 29.4V with a specified charging current of 1A. Confirm the complete charging profile and charge termination requirements for the ordered version.
• Discharge. The specified discharge entry is 6A. The summary does not define a separate peak duration or continuous-test condition; submit the full load profile for review.
• Discharge cut-off. 19.6V.
• Temperature. Charge between 0°C and 45°C. Confirm discharging and storage limits for this exact configuration; they are not stated in the supplied summary.
• Protection. Confirm the fitted protection functions and thresholds in the approved specification. Do not treat a protection-trip threshold as a normal operating target.

Connecting the Power Leads

The reference photographs show red and black leads with two connector housings. The summary does not specify connector part numbers, cable lengths or which connection is assigned to charging. Confirm the complete harness drawing before selecting mating components.

1. Compare the connector and mating socket with the approved drawing, including any separate charge, discharge or sensing contacts.
2. Confirm polarity and conductor functions before connection. Where red and black leads are supplied, verify positive and negative at the actual connector.
3. Allow clearance for cable bends and provide strain relief so the connector and lead exit do not carry mechanical loads.
4. Check sample fit, electrical behaviour and temperature rise with the equipment and charger specified for the project.

Devices That Match This Discharge Profile

Potential applications include portable instruments, inspection equipment and compact industrial electronics. The relevant match is equipment whose complete voltage range, sustained current and peak demand fit the approved pack specification.

Use the expected duty cycle and measured average draw to set a runtime target. Then validate that target with a sample inside the finished enclosure, including the effect of ambient temperature, conversion losses and the low-voltage cut-off.

Technical Support & Model Matching

Send Surlon Power the device voltage range, continuous and peak current with durations, runtime target, compartment drawing, connector and pinout, charging method, quantity and destination market. The Custom NCM Lithium Battery Packs range provides reference configurations for this review. Request the proposed drawing and specification, confirm applicable documents for the exact build, and evaluate a sample before approving production.

FAQ