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A reliable, high-capacity LiFePO4 cell built for durability and stable long-term performance.
The K2 26650 3.2V 3800mAh LiFePO4 battery cell is built for durability, safety, and high performance. With strong cycle life and stable discharge, it's ideal for solar energy storage, EV projects, DIY battery packs, and everyday high-drain devices.
The K2 26650 delivers dependable 3.2V output and supports up to 12A continuous discharge, with a 3800mAh capacity that provides strong energy storage while maintaining LiFePO4's well-known safety standards. Whether you need a single cell or a full pack for your build, K2 is a trusted name across the LiFePO4 industry.
Key Features
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3800mAh capacity, 12A continuous discharge — strong energy storage with reliable high-drain performance
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Stable 3.2V nominal output — consistent voltage delivery across the discharge cycle
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LiFePO4 safety profile — more thermally stable than standard Li-ion chemistry
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Flat top terminal, standard 26650 size — easy to integrate into existing setups or custom builds
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Rechargeable, long cycle life — built for repeated use in demanding applications
Specifications
| Specification |
Details |
| Manufacturer |
K2 |
| Model |
IFpR27/65 |
| Size |
26650 |
| Positive Terminal |
Flat Top |
| Nominal Capacity |
3800mAh |
| Continuous Discharge Rating (MAX) |
12A |
| Nominal Voltage |
3.2V |
| Maximum Voltage |
3.65V |
| Discharge Cut-off Voltage |
2.5V |
| Rechargeable |
Yes |
| Dimensions |
65.70mm x 26.20mm |
| Weight |
86g |
What's in the Box
- K2 26650 LiFePO4 Battery Cell(s), per quantity selected
FAQ
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What applications is this cell best suited for?
Solar energy storage, EV projects, DIY battery packs, and other high-drain LiFePO4 applications.
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What's the maximum charge voltage for this cell?
3.65V — do not exceed this when charging.
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Is this cell rechargeable?
Yes, it's a rechargeable LiFePO4 cell built for long cycle life.
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What terminal type does this cell have?
Flat top, standard 26650 size.
Before You Order
Not sure this is the right cell for your build? Chat with us about compatibility, pack building, or charging before you order — verify your device or battery pack supports this configuration.
You May Also Need
Building a full pack? Browse Cylindrical Cells, Battery Management Systems, Spot Welders, and Heat Shrink & Connectors.
Why Buy from Mach 1 Lithium
Mach 1 Lithium supplies genuine, tested cells for serious DIY builders — accurate specs, trusted manufacturers, and support if you're not sure what you need.
