Custom Battery Pack Questions for OEM Buyers
Find practical answers about preparing a battery inquiry, comparing NCM and LiFePO4 configurations, reviewing chargers and planning samples. For projects in Europe or North America, include the destination market and end application so the proposed pack can be reviewed against your requirements.
Can Surlon Power customize lithium battery packs for OEM equipment?
Surlon Power offers custom lithium-ion and LiFePO4 battery pack solutions. Include voltage, capacity or runtime, available space, connector, load profile and protection requirements in your brief. Labels and branding can also be discussed. The proposed design, available options and final specification are subject to project review. Learn more about our
custom battery pack service.
What information is needed for a custom battery pack quotation?
Send the application, destination country, nominal voltage and operating range, continuous and peak current with duration, target runtime, maximum dimensions, connector and pinout, charger details, sample quantity, production volume and target dates. Attach a drawing or existing specification where available. Use the
OEM battery pack RFQ checklist to prepare a complete inquiry.
Should I specify battery capacity in Ah or energy in Wh?
Provide both when available. Nominal energy in watt-hours is nominal voltage multiplied by capacity in amp-hours. Packs with different voltages cannot be compared by Ah alone. Actual runtime also depends on the equipment load, operating conditions and usable voltage range, so include a defined duty cycle in the project brief.
How should continuous current and peak current be specified?
State the normal continuous battery current separately from peak current. Include peak duration, frequency and the operating duty cycle. A short-duration discharge rating is not a continuous current rating, and a capacity value in Ah does not specify permitted current. Share the controller or equipment specification for review.
Should an OEM project use NCM or LiFePO4 cells?
The choice depends on pack voltage range, space and weight limits, load, charging system and operating conditions. Compare proposed packs at the same application requirements, rather than choosing on chemistry alone. Read our
NCM and LiFePO4 battery pack selection guide before finalizing the brief.
What does a battery management system (BMS) do?
Depending on the design, a BMS can monitor voltage, current and temperature and control protection responses. Cell balancing, state-of-charge reporting and communication are model-dependent functions. Ask which functions, thresholds and interfaces are included in the proposed pack. A BMS does not replace correct cell selection, charging compatibility or equipment validation.
Can a lithium battery replace a lead-acid battery using the same charger?
Do not assume compatibility from nominal voltage alone. Review the lithium pack's permitted voltage range, charger output and charging profile, equipment load, dimensions, polarity and protection requirements. Have the proposed battery and charger combination reviewed before installation. Confirm any required equipment or charging-system changes in the quotation.
Can a lithium battery pack be used for backup power?
A suitable pack can form part of a backup system, but the complete system must be reviewed. Define standby operation, required backup duration, load and startup current, charging method and how the load transfers to battery power. Confirm compatibility with the charger, inverter or controller and agree on validation with the intended equipment.
Which documents should buyers request for Europe or North America?
Identify the destination country, end application and the documents requested by your customer or responsible project team. Ask the supplier to confirm what is available for the exact proposed pack model and configuration. A cell report or a report for a different battery does not automatically cover a custom pack. Review document applicability before approving samples or production.
What are the minimum order quantity and sample lead time?
Request a project-specific quotation. The design, component availability, engineering work, sample quantity and validation scope can affect cost and timing. Ask for sample and production schedules separately, along with any one-time engineering or tooling charges and the items included in the quoted supply.
How should samples and battery life claims be evaluated?
Agree on sample acceptance criteria with your engineering team. Check fit, connector polarity, operation with the intended charger and load, runtime and temperature under defined conditions. For a cycle-life claim, request the charge and discharge conditions, temperature, depth of discharge and capacity-retention threshold. A laboratory cycle count does not guarantee the same service life in every application.
How should a lithium-ion or LiFePO4 battery be charged, stored and maintained?
Follow the manual and approved specification for the exact pack and charger, including charging, discharge and storage conditions. Charging and discharging temperature limits may differ. Confirm the storage state of charge, inspection interval and any recharge procedure for your model rather than applying one schedule to every battery. For a fault or damaged pack, contact the supplier for model-specific instructions before attempting a reset or repair.
How should used battery packs be recycled?
Ask a suitable battery collection or recycling service about the procedure for your pack and location. Identify the battery chemistry and condition, including any damage, so the service can advise on acceptance and handling. Use a collection route appropriate for batteries instead of placing a pack in general household waste.
Discuss Your Custom Battery Pack Project
Share your equipment requirements, drawings and quantities. Request a custom battery pack quotation or email market@surlonpower.com with your project brief.
