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K2 Energy LFP Charger – 12V 4Ah

Protect your investment with this 12 volt 4 amp charger. This modular and portable charger features various protections to ensure that your battery pack’s life is proteced. This charger comes with an SAE terminal along with a customized terminal for any of your power needs.




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The Perfect Solution

Introducing our state-of-the-art battery charger, the perfect solution for all your battery charging needs. This charger is specifically designed to work with LFP batteries and features a multi-stage charging algorithm that ensures safe and efficient charging. Protect your investment by using our battery charger and enjoy peace of mind knowing that your battery will always be fully charged and ready to go when you need it.


Our charger utilizes advanced technology to maximize charging efficiency, reducing charging time and minimizing energy loss, ensuring that your LiFePO4 battery is fully charged in the shortest time possible.


Our charger is constructed with high-quality components and undergoes rigorous testing to ensure consistent, reliable performance for all your battery charging needs.





How long will your battery last?

It depends on how you use it and the level of care you show it. We still have functional batteries that are 7 to 10 years old with at least 80% of their original capacity at K2.

What warranty does the battery have?

Our 1-year manufacturing warranty covers defective workmanship and materials. Depending on use, K2 batteries typically last up to 5-7 years with proper care.

How do I charge the battery?

Use chargers designed for Lithium Iron Phosphate batteries. For 12V batteries, charge to 14.4V and for 24V batteries, charge to 28.8V for best results.

What charger should I use?

K2 has two small chargers that can be used: K2C12V4A charger for 12V batteries and our K2C24V2A charger for 24V batteries. K2 will be introducing new chargers in the near future with higher charging current capabilities.

What is the temperature range for the battery?

Discharge–20 C to 60 C (-4 F to 140F)

Charge at 0 C to 55 C (32 F to 131 F)

How often do I need to charge the battery?

Charge it as soon as you receive it and after every use, especially if it is discharged until empty.

How can I get a data sheet for the battery?

Reach out to our customer support team at or give them a call at 702.478.3590.

What certifications does the battery have?

UNDOT 38.3. Check the data sheet for additional certifications.

Are your batteries waterproof?

No, splash resistant for most. Some can endure brief immersion in less than 1 meter of water, check the data sheet for additional information.

How should
I store my battery?

In a relatively cool dry place, fully charged for best results.

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