18650 battery pack
Mature sourcing, smaller diameter constraints, existing mechanical compatibility, and cost-controlled sampling.
Mature sourcingSmaller diameterFlexible layoutsLower sampling risk
Custom OEM/ODM Packs
Custom 21700 Lithium Battery Pack for OEM Equipment
Custom 21700 cylindrical lithium battery packs for OEM equipment that need higher cell capacity, fewer parallel groups, series-parallel architecture, enclosure, connector, BMS, and validation planning in one project path.
21700Energy / power / high-rateBMS / communication
Certification support
UN38.3 document reviewMSDS / SDS reviewTarget-market documentation review
Product image set
Quick shortlist specs
Full specs are confirmed in the technical table
Product overview
Product description
Custom 21700 cylindrical lithium battery packs for OEM equipment that need higher cell capacity, fewer parallel groups, series-parallel architecture, enclosure, connector, BMS, and validation planning in one project path.
Cylindrical cell pack selection
How to choose among 18650, 21700, and 32700 battery packs.
All three cylindrical routes support custom packs. The choice depends on chemistry, cell capacity, space limits, parallel count, rate capability, cycle life, cost, and equipment envelope.
21700 battery pack
Higher cell capacity, fewer parallel cells, stronger energy density, and a larger current margin.
Higher capacityFewer parallel cellsStronger energy densitySpace review needed
32700 LFP battery pack
Safety, thermal stability, long cycle life, and 12.8V / 25.6V LiFePO4 module platforms.
LiFePO4Long cycle12.8V / 25.6VSafety first
Cylindrical pack RFQ inputs
Voltage platformCapacityContinuous currentPeak currentRuntime targetCycle targetEquipment spaceWeight limitConnectorHarness lengthChargerBMS communicationCertification marketAnnual quantity
Download Technical Datasheet & Drawing
Custom 21700 Battery Pack
Leave your email and project requirement. We will treat the datasheet request as a high-intent RFQ and follow up with drawings and matching advice.
Product category path
Continue through the product category path.
Accessories
Capacity upsell & related products
Cell holder and nickel strip
Protection PCB / BMS
Harness and connector
Matched charger review
18650Energy / power / high-rateStable supply
Custom 18650 Battery Pack
Mature 18650 cylindrical-cell battery packs for OEM devices that need stable sourcing, flexible series-parallel design, BMS protection, harness and connector customization, and cost-controlled sampling.
- Voltage
- 1S to multi-S / custom examples
- Cell platform
- 18650 Li-ion / NMC by project; LFP option review
- Integration
- Cell + BMS + PACK
32700LiFePO412.8V / 25.6V class
Custom 32700 LiFePO4 Battery Pack
Custom 32700 LiFePO4 cylindrical OEM pack design for safer long-life 12.8V / 25.6V module platforms, with capacity, BMS, and enclosure confirmed by project.
- Voltage
- 12.8V / 25.6V / custom examples
- Cell platform
- 32700 LiFePO4
- Integration
- Cell + BMS + PACK
21700Energy / power / high-rateCell matching
21700 Cylindrical Lithium Cell
21700 cylindrical lithium cell supply for OEM buyers who need higher cell capacity, fewer parallel groups, energy / power / high-rate class shortlists, IR matching, and batch traceability within the available equipment space.
- Voltage
- 3.6V / 3.7V nominal
- Capability
- About 10-90A by class
- Chemistry
- 21700 Li-ion / NMC by project
Product FAQ
Custom 21700 Battery Pack
When should an OEM pack use 21700 cells instead of 18650 cells?
Choose 21700 when the pack needs higher cell capacity, fewer parallel cells, better energy density, or a larger current margin in the available space. Keep 18650 when diameter, existing holders, or mature low-risk sampling matter more.
Which project stage fits pack assembly service?
Choose Custom OEM pack design while cell selection, architecture, BMS, enclosure, connector, or validation still need engineering. Choose battery pack assembly service when the specification or drawings are ready for controlled production.
How should energy, power, and high-rate 21700 classes be shortlisted?
Start from continuous and peak current, then check runtime and thermal rise. Energy-class cells fit runtime-first packs; power-class cells balance capacity and current; high-rate cells need connector, wire gauge, and heat-path review before sampling.
When should buyers request bare 21700 cells instead?
Request bare cells when your team already controls pack layout, welding or holders, BMS, and validation. Use this page when you need pack-level OEM design.
Is this the finished robot battery platform page?
No. Finished robot / AGV battery platforms belong on the robot smart-equipment category. Use this page for custom 21700 pack engineering across OEM devices.
What information is needed for a custom 21700 battery pack quote?
Share voltage, capacity or runtime, continuous and peak current, equipment envelope, connector, charger, BMS communication needs, operating temperature, certification market, and expected annual quantity.