Large Capacity Cells

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Large Capacity Cells: selection guideLarge Capacity Cells from PLB are engineered for home ESS, solar lights, emergency lighting, power tools and standard modules. This guide explains the specifications, applications and selection criteria so you can specify the right large-capacity 26650 LiFePO4 cell for your pack or system.PLB manufactures large-capacity 26650 LiFePO4 cell in-house, from 26650 cell production to BMS design and PACK assembly. Every batch is capacity-graded and traceable, and the range covers 3,300–4,000mAh at 3.2V, 120–147Wh/kg.Key specifications to compareVoltage and capacity: 3,300–4,000mAh at 3.2V, 120–147Wh/kg.Discharge and charge: 3C continuous discharge with 5C 10-second pulses.Cycle life: 2,000–3,000 cycles at 100% depth of discharge.Temperature: −20°C to +60°C discharge and 0°C to +60°C charge.Mechanical: Ø26.3 × 65.3mm and 88g per cell.Start with the load profile rather than the datasheet headline. Continuous current, peak current and duty cycle determine the cell or pack configuration, while the available space fixes the mechanical format. For Large Capacity Cells, confirm the voltage window, the maximum continuous discharge and the expected depth of discharge before comparing cycle-life figures.Typical applicationsHome ESSSolar lightsEmergency lightingPower tools and standard modulesThese applications share one requirement: predictable performance over many cycles. A pack that is oversized on capacity but undersized on current will heat up and lose life; a pack that is oversized on current but undersized on capacity will need frequent charging. PLB engineers size Large Capacity Cells against both constraints.How to choose the right large-capacity 26650 LiFePO4 cellDefine the nominal voltage and usable capacity for the application.Confirm continuous and peak discharge current, including surge duration.Check the charge window and whether low-temperature charging is required.Select BMS protection, communication (RS485/CAN) and terminals.Validate the mechanical envelope, weight and IP rating.Send the load profile, operating temperature range and target pack format to PLB; the team will confirm the cell selection and prepare a quotation within one business day. For custom enclosures, terminals or communication protocols, include a drawing or interface specification.Quality, testing and compliancePLB operates under IATF 16949 and ISO 9001 quality systems, with in-house electrode, cell assembly, formation and PACK assembly. Cells and packs are designed to meet UL1642, UL2054, UL1973, IEC62133, UN38.3, RoHS and REACH requirements. See the UL standards, IEC standards and UN38.3 transport rules for the underlying requirements.Browse related pages: Large Capacity Cells overview, the product range below, and contact PLB for a datasheet or quotation.Representative productsIFR26650-38A 3800mAh 26650 LiFePO4 CellIFR26650-33A 3300mAh 26650 LiFePO4 CellIFR26650-40A High-Capacity 4000mAh 26650 LiFePO4 CellFAQWhat is the difference between the models in Large Capacity Cells? Models differ in capacity, continuous and pulse current, temperature range and cycle life. Compare the specification table and select by load profile rather than capacity alone.Can PLB customize voltage, capacity or enclosure? Yes. PLB designs custom LiFePO4 packs with matching BMS, enclosure, terminals and communication interfaces. Send your requirements for a proposal.How do I request a datasheet or quote? Use the contact form or the quote button on any product page. Engineers reply within one business day with a datasheet and quotation.