$1,784.99 USD

The Aegis Battery Lithium Master 12V 300Ah Lithium Iron Phosphate - LiFePo4 Battery is a state of the art rechargeable battery pack made with Lithium Iron Phosphate cells designed for 12V devices. It is perfect for RV's, motorhomes, marine, solar storage, robots, and other applications that require a higher-energy density battery.

The battery comes with integrated M10 Copper Terminal Screws, making it a perfect drop in solution for your applications. The Aegis battery has a built in battery management system (BMS) that keeps the battery running at peak performance and protects the cells for thousands of cycles, including over-charge, over-discharge, over-current, and short-circuit protection.

For out of stock kits, we may be able to provide another compatible charger. Please contact us and we can check for you.

 Battery Model Number: ALF-012300A

ALF-012300A Battery Spec and User Manual

Charger Model Number: CRF-1220M

For more info & usage notes for our lithium batteries, please click here.


Battery Type LFP (LiFePO4) - ABS Case
Cell Type/Assembly Method Cylindrical cells/welded
Voltage (V) 12V
Capacity (Ah) 300Ah
Energy Stored (Wh) 3600 Watt-Hours
Weight 77.1 lbs. (35.0 kg)
Dimension Metric (L x W x H) 520 mm x 267 mm x 220 mm (+/-2mm)
Dimension Imperial (L x W x H) 20.5 in x 10.5 in x 8.7 in (+/-0.1in)
Charge / Discharge Connector M10 Screw Terminal
Cycle Life 3000+ cycles
Normal Charged Voltage 14.6V
Normal Charge Current 20.0 Amps
Normal Battery Cutoff Voltage
Nominal Continuous Discharge Current 50.0 Amps
Maximum Continuous Discharge Current 100.0 Amps
Maximum Pulse (Peak) Discharge Current  200.0 Amps (2 Seconds)
Charge Temperature 0°C to 45°C
Discharge Temperature -20°C to 60°C
Operating Humidity 60±25%R.H
Storage Humidity 60±25%R.H
Automatic Battery Protection Module/System Low Voltage Disconnect
Over Voltage Disconnect
Short Circuit Protection
Reverse Polarity Protection
Cell Balancing

Charger Information Link: 12V 20A LiFEPo4 Charger

LFP Advantage

  • Advanced LFP (Lithium Iron Phosphate) Li-ion Chemistry superior to traditional Li-ion Batteries
  • All-Aspect Solution with best overall balance of features
  • High Specific Energy (90-120Wh/kg)
  • Designed Specifically for Marine, RV and Deep Discharge Electronics
  • Excellent Lifespan (3000+ Cycles Average)

Intelligent Technology

  • Battery Management System (BMS) Board as Standard
  • Every Battery has bespoke board matching its performance parameters
  • Comprehensively balances charging and discharging
  • Internal balancing circuitry and charger circuitry inside BMS
  • Comprehensive protections against over-charge, over-discharge, over-voltage, over-current, short circuits, reverse polarity, thermal protection
  • Dramatically extends service life


  • Achieve full depth discharge of 100% Label Capacity
  • “True Lithium Capacity” guarantees capacity of purchase is capacity delivered
  • Reliable, repeatable full depth cycling without system life cycle degradation
  • LFP Systems can be fully discharged safely without impact on system performance
  • Multiple times usable capacity of Lead Acid

Warranty: 3 years
Repair or Replace: 3 years
Returns/exchange: 30 days (Return ⟶ a 10% restocking fee plus shipping; exchange ⟶ charging shipping cost)
Cancellation: Within 24 Hours ⟶ No charge
Shipping: Standard within 2-3 business days