When compared to traditional lead acid batteries...

Product Highlights

• Powered by high-capacity lithium iron phosphate cells - ensuring superior performance & power delivery.

• Ultra-lightweight design - remarkably easy to move compared to traditional sealed lead-acid batteries.

• Automatic Self Heating - for freezing temperatures and battery cell protection.

• Advanced BMS - high/low voltage cutoff, overcharge protection, short circuit protection, & high/low temperature protection.

• Auto-balancing cell function - to actively maintain consistent voltage and state of charge across all LiFePO4 cells to extend battery lifespan.

• IP-65 rated case - Dust tight; Full protection & Protection against directed water jets of low pressure (6.3mm) from any angle.

Product Benefits

Safe Battery Design

K2 LiFePO4 chemistry batteries are less likely to leak, rupture, or experience thermal runaway leading to a fire or explosion. Lithium batteries are more environmentally friendly than SLA batteries. as they don’t contain any toxic heavy metals.

Lower Total Cost of Ownership

LiFePO4 batteries are more cost-effective option in the long run. Experience longer lifespans and require less maintenance, saving you money over time.

No Maintenance & Longer Lifespan

LiFePO4 batteries are low-maintenance, eliminating the need for regular upkeep. In contrast, Lead Acid batteries demand ongoing maintenance, such as the addition of distilled water and the replacement of corroded terminals. Lithium batteries exhibit superior charge retention and an extended overall lifespan.

What Makes Us Different

Free Shipping

on all order over $150

Pioneering LFP Innovation

for over 16 years

Designed & Developed in the USA

and proud of it

Extended Cycle Life

The K2 Ebox 12v 100ah G31 battery offers extended cycle life of over 4,000+ cycles, guaranteeing years of reliable outdoor use.

Automatic Self-Heating

K2 Self-Heating automatically turns on when temperature reaches 32°F & turns of at 41°F - just connect to an inverter or external power.

Real-Time Battery Monitoring

K2 advanced RS485 communication port and hyper terminal, allowing you to monitor the state of the battery in real time.



5-year manufacturing warranty covers defective workmanship and materials

Storage Capacity

100 Ah (amp hours). K2 Energy's batteries deliver a steady power output over the entire span of 100 amp hours


33.6 lbs (15.2 Kg) - More than 50% lighter than comparable lead acid batteries


M8 Bolt Terminals- these heavy-duty connectors are typically found in harsh environments


LxWxH - 12.6 in. (320mm) x 6.5 in (165mm) x 7.9 in (200mm)



Operating Temperature

12.2 to 131°F (-11°C to 55°C) - Far exceeding the safe operating range of traditional lead acid batteries


Maximum Continuous Discharge Current of 100A


1280 Watts (Wh)

Group Size 31

Most common in marine, automotive, & off-grid applications

Added Benefits

Includes Self Heating Capability, RS4850 & CAN Ports, Battery Management System (BMS), & an IP-65 Enclosure

Series & Parallel

Wiring In Series: Max 2 Packs
Wiring In Parallel: Max 8 Packs

Frequently Asked Questions


Unbelievably light weight. Will be perfect for running my QRP rig from the field. Amazing technology. Would recommend to anyone.

John T.

Love this battery. Maintenance free and SAFE! I use mine for storing solar energy for DC powered projects and applications.


A lightweight and long-lasting battery

Jeff Tang

12 days ago

These K2 batteries are perfect. They work exactly as advertised and the run time is a little longer than I had expected.

David O.

Cutting edge technology and impeccable customer service. Highly recommended!

Derk Hebdon

Verified customer