Amprius SA110 12A 18650 Battery Cell – 4000mAh Ultra High Capacity

Amprius SA110 18650 Battery Cell – 4000mAh Ultra High Capacity

Now available in the USA: the Amprius SA110 (INR18650/40), one of the highest capacity 18650 lithium-ion cells currently available on the market.

This is not your typical 18650. While most cells stay in the 3000mAh–3500mAh range, this one pushes a true 4000mAh capacity, making it one of the best options for maximum runtime builds.

DIY500AMP Insight:
If your goal is runtime, this is one of the strongest 18650 options you can get right now. But like all high-capacity cells, it is not designed for extreme current.

Important: Some sellers advertise this cell at 13A continuous. Yes, it can reach that level, but for real-world builds, we recommend staying in the 5A–8A range per cell to keep temperatures low and extend lifespan.

This cell is designed for efficiency, capacity, and stability, not peak power.

Applications include:

• High-capacity battery packs
• Flashlights and portable electronics
• Solar energy storage systems
• Low to medium current builds
• Projects where maximum runtime per cell is critical

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Technical Specifications

Model	Amprius SA110 (INR18650/40)
Cell Type	Lithium-ion rechargeable (High Energy Density)
Size	18650 – Standard cylindrical format
Nominal Voltage	3.52V
Nominal Capacity	4000mAh
Nominal Energy	14.08Wh
Charge Voltage	4.20V (CCCV)
Standard Discharge	~4A–6A recommended
Maximum Continuous Discharge	Up to 13A (not recommended for continuous use)
Voltage Range	2.50V – 4.20V
Weight	Typical 18650 format
UN Classification	UN3480 – Class 9 Lithium Battery

Download Amprius SA110 MSDS Documentation

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DIY500AMP Engineering Notes

This is a capacity-first cell. If you treat it like a power cell, you will not get the performance it is designed for.

Here is the reality:

• You gain capacity, not current
• You get longer runtime, not higher burst power
• You trade peak amps for efficiency

Best way to use this cell:

• Keep current in the 5A–8A range
• Increase parallel groups instead of pushing single cells
• Design your pack for efficiency, not stress

When used correctly, this cell will deliver excellent runtime, lower heat, and better long-term stability compared to pushing lower-capacity cells to their limits.

DIY500AMP Tip: If your build needs more than 10A per cell, this is not the right cell. If your goal is runtime and efficiency, this is one of the best 18650 options available.

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Safety Warning for Lithium Ion Battery Usage

Customers should have a clear understanding of lithium ion battery handling and safety before making a purchase. Lithium ion batteries are highly sensitive and may pose fire, burn, or explosion risks if improperly handled. Always charge batteries on fire resistant surfaces, and never leave them charging unattended.

By purchasing, you assume full responsibility for any injury, damage, or loss arising from the incorrect use or handling of lithium ion batteries or chargers. Compatibility with specific devices is not guaranteed. Only charge using a smart charger designed specifically for this battery type, and do not mix old or used batteries with new ones.

Important Usage Guidelines:

• Not for use in e-cigarettes or similar devices. Lithium ion batteries present a serious risk of injury, property damage, or death if improperly used.

• Risk of fire and explosion. Misuse can cause batteries to ignite, explode, or release harmful gases.

• Always use in a protected pack. Ensure batteries are used within intended specifications and supported by appropriate circuitry.

• Proper storage and handling. Store batteries in protective cases, away from metal items to prevent short circuits.

• Inspection prior to use. Do not use batteries with damaged wrappers, torn insulators, or visible damage.

• Follow manufacturer charging specifications. Avoid overcharging or over discharging, and never alter, dismantle, puncture, crush, or burn.

• Heat and water precautions. Do not expose batteries to high temperatures or any liquids.

• Assembly guidelines. Batteries should only be spot welded. Do not solder directly onto battery terminals.

Users are expected to have battery handling knowledge before purchasing. By using these batteries, you acknowledge that usage is solely at your own risk, and you take full responsibility for any resulting consequences.

For resellers: Please ensure all safety information is passed along to end users to promote safe handling and proper use.