LiFePo4 32650 Rechargeable Battery 3.2V 4000mAh with Screw (USED LIKE NEW)

Description

LiFePo4 32650 Rechargeable Battery 3.2V 4000mAh with Screw (USED LIKE NEW) The LiFePo4 32650 Rechargeable Battery 3.2V 4000mAh with Screw (USED LIKE NEW) is a cylindrical Lithium Iron Phosphate (LiFePO4/LFP) rechargeable cell designed for battery packs, energy storage systems, backup power, lighting, and other applications requiring a 3.2V rechargeable cell. The 32650 industrial form factor measures approximately 32mm in diameter and 65mm in length and is fitted with a bolt/stud terminal for direct bolting into battery packs or suitable assembly connections. Features: Lithium Iron Phosphate (LiFePO4/LFP) rechargeable cell. 32650 cylindrical form factor. 3.2V nominal voltage. 5000mAh marked/nameplate capacity. 3700–4700mAh verified capacity range at low/medium discharge rates. Highest confirmed tested capacity of 4712mAh. Bolt/stud terminal for direct bolted connections. Approximately 32mm diameter. Approximately 70mm length. Specifications: Parameter Value and Details Chemistry: Lithium Iron Phosphate — LiFePO4 (LFP) Form Factor / Size: Cylindrical 32650 — approx. 32mm diameter × 65mm length Terminal Type: Bolt / Stud Terminal Marked (Nameplate) Capacity: 5000mAh (supplier’s marketing figure) Verified Capacity — Low/Medium Discharge Rate (≤ 1C): 3700 – 4700mAh (varies by sample); highest confirmed reading: 4712mAh (2.5V cutoff, 14.7Wh, 1:34:15 runtime) Verified Capacity — High Discharge Rate (~4.5–5C / 22–24A): ≈ 2300 – 2400mAh (natural reduction due to Peukert effect) Nominal Voltage: 3.2V Max Charge Voltage: 3.65V Recommended Discharge Cutoff Voltage: 2.5V Absolute Minimum Voltage (never exceed): 2.0V Internal Resistance — AC ESR Meter: 7 – 20 mΩ (sample-to-sample variation observed) Internal Resistance — Under Real DC Discharge Load: ≈ 31 mΩ (may include wiring/contact resistance) Max Discharge Current Actually Tested Without Failure: 22.76 – 24A (≈ 4.5C) — cell ran stably until approaching cutoff voltage Cathode (Positive Electrode): Lithium Iron Phosphate (LiFePO4), thermally stable olivine structure Anode (Negative Electrode): Graphite Separator: Porous, heat-resistant polymer membrane Electrolyte: Lithium salt dissolved in an organic solvent Outer Casing: Metal can (steel/aluminum), pressure-resistant, with safety vent for gas release Test: Applications: Solar energy storage systems. Small-scale energy storage. Electric bicycle battery packs. Electric scooter battery packs. Low-to-medium power backup systems. UPS battery systems. High-power flashlights. LED lighting equipment. Battery pack construction. Industrial applications requiring LiFePO4 chemistry. DIY energy storage projects. Package Include: 1x LiFePo4 32650 Rechargeable Battery 3.2V 4000mAh with Screw (USED LIKE NEW) 1x Screw 1x nut 1x nut washer Documents: Makers_Battery_Datasheet_AR.pdf Makers_Battery_Datasheet_EN.pdf

From the supplier's page.