EVE 22Ah LiFePO4 Car Audio Battery – 10C Continuous / 20C Burst
Built around genuine 22Ah EVE LiFePO4 cells, these lithium battery banks are designed for high power car audio systems that need substantial current delivery, useful reserve capacity and stable electrical support under amplifier load.
Each 22Ah cell is rated at 10C continuous and 20C burst, equal to approximately 220A continuous and 440A burst per 22Ah parallel group. By increasing the number of parallel cells, the available current scales directly across our 44Ah, 88Ah, 132Ah, 176Ah and 220Ah battery configurations.
These banks are suited to serious daily systems, bass heavy demo builds and high RMS car audio installations where the factory electrical system can no longer provide enough current on its own.
22Ah EVE LiFePO4 Cell Architecture
The battery is built using 22Ah EVE Lithium Iron Phosphate cells configured as a 4S car audio battery bank.
- 22Ah EVE LiFePO4 cells
- 10C continuous discharge capability
- 20C burst discharge capability
- High current output for demanding amplifiers
- Useful reserve capacity for extended music playback
- Low resistance electrical architecture
- Long cycle life when operated within appropriate voltage and temperature limits
LiFePO4 works particularly well in 12V class car audio electrical systems because a 4S bank operates within the voltage range used by conventional vehicle charging systems. Unlike a 6S LTO bank, these EVE LiFePO4 batteries do not require a 15V or 16V charging system.
10C Continuous / 20C Burst Current Capability
The discharge capability increases directly with bank capacity. Every additional 22Ah parallel cell group adds approximately 220A continuous and 440A burst capability.
| Bank Capacity | Configuration | 10C Continuous | 20C Burst |
|---|---|---|---|
| 44Ah | 4S2P | 440A | 880A |
| 88Ah | 4S4P | 880A | 1,760A |
| 132Ah | 4S6P | 1,320A | 2,640A |
| 176Ah | 4S8P | 1,760A | 3,520A |
| 220Ah | 4S10P | 2,200A | 4,400A |
The burst rating is intended for short duration current demand such as heavy bass transients. Continuous system design should be based primarily around the 10C rating, charging system output, cable capacity, voltage drop and the actual current demand of the amplifiers.
Estimated Car Audio Amplifier Support
The figures below provide a practical comparison between the different EVE LiFePO4 bank sizes. Calculations use the 10C continuous battery rating, a 14.4V electrical system and approximately 80% amplifier efficiency.
For the alternator examples, approximately 75% of rated alternator output has been treated as available to the audio electrical system. Actual amplifier output will depend on alternator performance at engine speed, vehicle electrical demand, cable resistance, impedance rise and voltage maintained at the amplifier terminals.
| Bank Capacity | Battery Only | + 200A Alternator | + 300A Alternator |
|---|---|---|---|
| 44Ah | ≈ 5,100W RMS | ≈ 6,800W RMS | ≈ 7,700W RMS |
| 88Ah | ≈ 10,100W RMS | ≈ 11,900W RMS | ≈ 12,700W RMS |
| 132Ah | ≈ 15,200W RMS | ≈ 16,900W RMS | ≈ 17,800W RMS |
| 176Ah | ≈ 20,300W RMS | ≈ 22,000W RMS | ≈ 22,900W RMS |
| 220Ah | ≈ 25,300W RMS | ≈ 27,100W RMS | ≈ 27,900W RMS |
Important: These figures describe calculated electrical capability, not a guaranteed amplifier recommendation. A battery capable of supplying the required current does not replace the need for adequate alternator output, correctly sized OFC cable, strong grounds and properly fused power distribution.
Charging Voltage & Electrical System Compatibility
These EVE batteries use a 4S LiFePO4 configuration and are intended for conventional 12V class automotive charging systems.
Recommended vehicle charging range:
Approximately 14.0V – 14.4V
Maximum 4S LiFePO4 charging voltage:
14.6V
- Well suited to conventional 14V automotive electrical systems
- Compatible with upgraded high output alternators when correctly regulated
- Does not require the elevated charging voltage used by 6S LTO systems
- Provides strong usable capacity throughout a normal automotive voltage range
- Allows straightforward integration into many high power car audio builds
Do not charge a 4S LiFePO4 bank above 14.6V. A vehicle configured for 15V, 15.8V or 16V LTO charging is not directly compatible with this battery.
Choosing the Correct EVE LiFePO4 Bank
Battery capacity should be selected around the complete electrical system rather than amplifier wattage alone.
- 44Ah: Compact high current bank for smaller high power systems or builds with strong alternator support.
- 88Ah: Increased current capability and reserve capacity for larger daily and demo systems.
- 132Ah: Strong option for serious multi kilowatt systems requiring considerably more electrical reserve.
- 176Ah: Large capacity bank for demanding demo systems and substantial amplifier loads.
- 220Ah: Maximum capacity configuration for extreme car audio electrical systems requiring very high current capability and reserve capacity.
A larger bank increases both maximum available current and the amount of stored energy available between charging cycles. For systems played hard for extended periods, reserve capacity can be just as important as the headline discharge rating.
Real World Car Audio Applications
The EVE 22Ah LiFePO4 range is suited to:
- High RMS daily car audio systems
- Bass heavy music systems
- Demo vehicles
- Multiple amplifier installations
- Vehicles with high output alternators
- Systems suffering excessive voltage drop with conventional batteries
- Large lithium bank installations requiring additional reserve capacity
When matched correctly to the alternator, cabling and amplifier demand, the battery can operate as the primary rear mounted car audio battery and provide substantially greater current capability than a conventional starting battery arrangement.
Built for High Current Car Audio
A high current lithium battery is only as effective as the connections around it. Evolution Lithium banks are built specifically around the cable sizes, current loads and installation requirements found in serious car audio systems.
- 22Ah EVE LiFePO4 cells
- 10C continuous / 20C burst discharge specification
- 44Ah, 88Ah, 132Ah, 176Ah and 220Ah configurations
- Custom MDF enclosure with clear acrylic lid
- Integrated active cell balancer
- CNC machined aluminium busbars
- Heavy duty positive and negative cable mounting points
- Suitable for 2/0 cable connections
- Supplied with required bank assembly hardware
- Assembled in New Zealand
Installation Requirements
These are high current batteries and must be installed as part of a properly designed electrical system.
- Install in the cabin, boot or another protected rear location away from engine bay heat
- Use correctly sized OFC power and ground cable
- Fuse the positive cable appropriately at the battery
- Use secure low resistance chassis and battery grounds
- Verify alternator charging voltage before connecting the battery
- Do not exceed 14.6V charging voltage
- Size the bank around actual amplifier demand and charging system capability
Build Time
Standard Build Time: 7–10 days
Extended Lead Time if required: 3–4 weeks
For the best results, match the EVE LiFePO4 bank to your amplifier load, alternator output and charging voltage rather than selecting a battery from amplifier wattage alone.
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