Pay in 4 interest-free payments with Afterpay
Ships from trusted U.S. suppliers
A safe, high-capacity cylindrical cell for serious DIY battery builds.
This IFR26650 cell delivers 3400mAh of capacity in a standard 26650 form factor, built with Lithium Iron Phosphate (LiFePO4) chemistry for superior thermal stability over standard Li-ion. At just 85g, it's a reliable, drop-in option for flashlights, solar storage, DIY battery packs, and other 26650-compatible builds.
Why LiFePO4?
LiFePO4 chemistry is widely regarded as the safest lithium chemistry available for DIY builds and high-drain devices — it carries a much lower risk of thermal runaway than standard Li-ion, and holds a steadier voltage across its full discharge cycle.
Key Features
-
3.2V, 3400mAh capacity — reliable, high-capacity power in a standard 26650 size
-
LiFePO4 chemistry — significantly more thermally stable than standard Li-ion cells
-
2000+ cycle life — built to last through heavy repeated use
-
Compact, standard form factor — 26mm x 65mm, 85g, drop-in compatible with 26650 devices
-
Certified safe — CE, RoHS, and UN38.3 certified
Ideal Applications
- High-drain flashlights (P70, P90, and other 26650-compatible lights)
- DIY LiFePO4 battery packs
- Solar energy storage systems
- RV and off-grid power setups
- Power tool battery conversions
- Trail cameras and thermal scopes
Specifications
| Spec |
Value |
| Model |
IFR26650 |
| Nominal Voltage |
3.2V |
| Nominal Capacity |
3400mAh |
| Chemistry |
LiFePO4 (LFP) |
| Diameter |
26mm |
| Length |
65mm |
| Weight |
85g |
| Cycle Life |
2000+ cycles |
| Certifications |
CE, RoHS, UN38.3 |
What's in the Box
- IFR26650 LiFePO4 Battery Cell(s), per quantity selected
FAQ
-
What devices is this cell compatible with?
Any 26650-sized device or battery pack, including high-drain flashlights, DIY battery packs, and solar/off-grid power systems.
-
Is LiFePO4 safer than standard Li-ion?
Yes, LiFePO4 offers significantly better thermal stability and a much lower risk of thermal runaway than standard Li-ion chemistry.
-
How many charge cycles can I expect?
This cell is rated for 2000+ charge cycles.
-
Is this cell certified for safe shipping and use?
Yes, it's CE, RoHS, and UN38.3 certified.
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 battery pack? Browse Cylindrical Cells, Battery Management Systems, Spot Welders, and Heat Shrink & Connectors — everything you need for a DIY build.
Why Buy from Mach 1 Lithium
Mach 1 Lithium supplies certified, tested cells for serious DIY builders — accurate specs, real certifications, and support if you're not sure what you need.
