Limitless Lithium Retro Pro 56 Group 24 Lithium Battery
Key features
- Chemistry: LiFePO4
- Nominal voltage: 12 V
- Capacity: 56 Ah
- Resting voltage: 13.1–13.4 V
- Maximum charging voltage: 14.8 V
- Battery management system: Not installed; internal balancing board fitted
Limitless Lithium Retro Pro 56 Group 24 Lithium Battery is backordered and will ship as soon as it is back in stock.
Limitless Lithium Retro Pro 56 Group 24 Lithium Battery is backordered and will ship as soon as it is back in stock.
Description
Description
Product Overview
Support a high-draw car audio system with the Limitless Lithium Retro Pro 56, a 12V LiFePO4 battery with 56Ah capacity. Its Group 24 form factor, internal balance board, and high burst-current rating suit demanding audio applications.
The 21 lb battery has a positive-left terminal orientation and is designed for frequent recharge cycles, with a stated life cycle rating of 2,000 cycles at 80% DOD.
Key Features & Benefits
- 56Ah LiFePO4 capacity: Provides battery capacity in a Group 24 case for high-drain car audio systems.
- High current ratings: Supports up to 750A continuous discharge and 1,200–1,300A burst discharge, depending on temperature.
- Internal balance board: Handles cell balancing within the battery.
- Group 24 dimensions: Measures 8.75 inches high, 6.5 inches deep, and 10.125 inches wide.
- Recharge limits: Accepts up to 400A input charge current and has a maximum charge voltage of 14.8V.
Technical Specifications
| Specification | Value |
|---|---|
| Model | Retro Pro 56 |
| Voltage | 12V |
| Resting Voltage Range | 13.1V–13.4V |
| Capacity (Amp Hours) | 56AH (Not Pb Eq) 200-240 Pb Eq |
| Chemistry | LifePo4 |
| Operating Temperature Range | -30 to 60 °C / -22 to 140 °F |
| Weight | 21 lbs |
| Dimensions | Height 8.75″; Depth 6.5″; Width 10.125″ |
| BCI Group / Case | Group 24 |
| Terminal Size | M8x125 |
| Terminal Orientation | Positive Left |
| Life Cycles | 2,000 @ 80% DOD |
| Battery Management System (BMS) | No |
| Balance Board | Yes (Internal) |
| Max Charge Voltage | 14.8V |
| Max Charge Voltage BMS Cutoff | NA |
| Minimum Discharge Voltage BMS Cutoff | NA |
| Max Input Charge Current | 400A; charging higher than this can reduce cycle life |
| Continuous Discharge Current | 750A |
| Max Discharge Current (Burst Amperage) | 1200–1300A (Temperature dependent) |
| Continuous Wattage Range (Alt. size dependent) | 9,000–13,000W (100A–400A Alt) |
| Burst Wattage (Alt. size dependent) | 16,000W |
Why Choose This Product?
The Retro Pro 56 combines a compact Group 24 case with high continuous and burst discharge ratings for car audio applications. Its internal balance board handles cell balancing, while the stated 2,000-cycle rating at 80% DOD gives you a key reference when comparing batteries for repeated use.
Its listed wattage range varies with alternator size. Consider that rating alongside your system’s requirements when selecting a battery.
Installation & Compatibility Notes
Check the Group 24 dimensions, positive-left terminal orientation, and M8x125 terminal size against your mounting space and connections. The battery has no BMS, so keep charging and discharging within its stated voltage and current limits.
Maximum charge voltage is 14.8V, and maximum input charge current is 400A. Charging above 400A can reduce cycle life. Burst discharge current is temperature dependent.
Frequently Asked Questions
What is the capacity of the Retro Pro 56?
It is rated at 56Ah in LiFePO4 chemistry. The source also lists a 200–240 Pb Eq comparison.
Does this battery have a BMS?
No. It has an internal balance board, but no BMS.
What are the battery’s dimensions and terminal orientation?
It measures 8.75 inches high, 6.5 inches deep, and 10.125 inches wide. The terminal orientation is positive left.
What charging limits should I observe?
Maximum charge voltage is 14.8V, and maximum input charge current is 400A. Charging above that current can reduce cycle life.
How much discharge current can it handle?
The continuous discharge rating is 750A. Burst discharge is rated at 1,200–1,300A, depending on temperature.
Explore More
Shop for the Limitless Lithium Retro Pro 56 at 12 Volt Outlet. Want to learn more about Limitless Lithium? Explore our Limitless Lithium brand profile.
|
Model |
Retro Pro 56 |
|
Voltage |
12V |
|
Resting Voltage Range |
13.1V-13.4V |
|
Capacity (Amp Hours) |
56AH (Not Pb Eq) 200-240 Pb Eq |
|
Chemistry |
LifePo4 |
|
Operating Temperature Range |
-30-60℃/-22℉-140℉ |
|
Weight |
21 lbs |
|
Dimensions |
Height 8.75†Depth 6.5†Wide 10.125†|
|
BCI Group Case |
Group 24 |
|
Terminal Size |
M8x125 |
|
Terminal Orientation |
Positive Left |
|
Life Cycles |
2,000 @ 80% DOD |
|
Battey Management System (BMS) |
No |
|
Balance Board |
Yes (Internal) |
|
Max Charge Voltage |
14.8V |
|
Max Charge voltage BMS Cutoff |
NA |
|
Minimum Discharge Voltage BMS cutoff |
NA |
|
Max Input Charge Current |
400A *Charging higher than this can reduce cycle life |
|
Continuous Discharge Current |
750A |
|
Max Discharge Current (Burst amperage) |
1200-1300A (Temperature dependent) |
|
Continuous Wattage Range (Alt. size dependent) |
9,000-13,000W (100A-400A Alt) |
|
Burst Wattage (Alt size dependent) |
16,000W |
