E3.400 - 400 CCA LiFePO4 Battery

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ITEM # : E3.400
Ultra-light battery weighs just 4.9 pounds!





Dollar for dollar E3 Lithium is the lightest, most powerful, most economical battery on the market today. E3.400 features 840 Pulse Cranking Amps and 15.6 amp hours of capacity at a scant 4.9 pounds! Some of the performance benefits include:

  • 80% Lighter than traditional batteries
  • 3x Longer life than traditional batteries
  • Charges faster than traditional batteries
  • Delivers much quicker starts than traditional batteries
  • IP 66 Environmental Rating (pressure washer friendly)
  • Centered terminals allow mounting in any position
  • Environmentally friendly
  • 5 Year Warranty (see warranty page for details)

All E3 Lithium Batteries also feature a built-in Battery Management System. This system offers the following attributes to ensure years of trouble-free power delivery from your E3 Lithium Battery.

  • Over-Charge Protection
  • Over-Discharge Protection
  • Short Circuit Protection (up to 1,000 amps)
  • Excessive Cranking Protection
  • Built In Cell Balancing Technology
  • LED Battery Fault Light Indicator (select models only)

Brass terminal adapters are available for purchase separately.

NOTE: A lithium compatible battery charger is required in order to properly and safely charge your E3 Lithium Battery. We recommend OptiMate Lithium Chargers which you can purchase buy cliking the following link:

Click HERE to buy the OptiMATE Lithium Charger

All E3 Lithium Batteries are designed, engineered and manufactured right here in the USA using imported lithium cells.

Voltage: 13.2V

Pulse Crank Amps (PCA): 840A (3 sec @ 25 °C, voltage >9V)

Cold Crank Amps (CCA): 400A (modified SAE test, 3 sec@ 0°F, volts >7.2V)

Capacity: 15.6Ah

Weight: 4.9 lb. (2.2Kg)

Dimensions: 6.5”L x 3.1”W x 6.6”H (166mm x 79mm x 168mm)

Capacity vs Temperature: 25 °C = 100% 0°C = 92% -30°C = 80%

Self-Discharge Rate: < 3% per month @ 25 °C

Continuous Discharge Amps: 150A

Standard Charge Voltage: 13.9 - 14.6 V

Maximum Charge Voltage: 15V

Recommended Charge Amps: 5 - 20A

Max Charge Amps: 80A (from vehicle charging system)

Life (Charge cycles, 80% depth of discharge): 4000 cycles @ 1C discharge rate, 25°C & 2000 cycles @10C discharge rate, 25°C

Life (Years): Up to 8 Years

Environmental Rating: IP 66 (safe to wash down with a high pressure washer)

Operating Temperature: -30 °C to +60 °C

Storage Temperature: -40 °C to +70 °C


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  1. E3 Lithium MSDS (Click here to download)

    E3 Lithium Material Safety Data Sheet

  2. E3 Lithium Owner's Manual (Click here to download)

    E3 Lithium Owner's Manual