WT27148154F-50LB 3.2V 50Ah Low Temperature Prismatic LiFePO4 Battery Cell
The WT27148154F-50LB is a wide-temperature rechargeable lithium-iron phosphate prismatic cell for cold-region equipment and custom battery pack projects. It combines 3.2V nominal voltage, 50.0Ah nominal capacity, low internal resistance, and cold-temperature charge and discharge ratings for industrial and outdoor power systems.
Product Overview
This low temperature LiFePO4 cell is built for rechargeable systems that must remain available in refrigerated logistics, winter outdoor cabinets, communication backup, solar lighting, agricultural monitoring, and field equipment. Its prismatic shape and screw-terminal structure support compact pack design, busbar connection, and serviceable assembly layouts.
Core Electrical Parameters
| Parameter | Specification |
|---|---|
| Model | WT27148154F-50LB |
| Battery Type | Wide-temp rechargeable lithium-iron phosphate prismatic cell |
| Nominal Voltage | 3.2V |
| Nominal Capacity | 50.0Ah |
| Minimum Capacity | 49.5Ah |
| Charge Cut-off Voltage | 3.65V |
| Discharge Cut-off Voltage | 2.0V |
| Low Temperature Charge | 7.5A (0.15C) at -20°C to 0°C; operating charge range -30°C to 60°C |
| Low Temperature Discharge | 25.0A (0.5C) at -40°C to 0°C; operating discharge range -50°C to 60°C |
| Dimensions and Weight | 148.00±0.30 x 26.50±1.00 x 153.60±0.50 mm with plastic film; about 1200g |
Pack Size and Structure
The cell uses a flat prismatic format with top screw terminals and a compact body suitable for module assembly. Its drawing dimensions support enclosure design, terminal clearance planning, and busbar layout for custom low-temperature packs.
| Drawing Item | Dimension |
|---|---|
| Cell width | 148.00±0.30 mm |
| Cell thickness | 26.50±1.00 mm |
| Cell height with plastic film | 153.60±0.50 mm overall; 150.00±0.30 mm body reference |
| Terminal spacing | 116.20±0.30 mm |
Low Temperature Performance
For low-temperature charging, the cell supports reduced-current charging at sub-zero temperatures, including 7.5A standard charging from -20°C to 0°C and a charge operating range down to -30°C. For low-temperature discharge, the specified operating range extends to -50°C, with 25A standard discharge from -40°C to 0°C.
The low-temperature discharge retention table lists at least 75% capacity at -40°C and at least 85% capacity at -20°C under 1.0C discharge conditions. These values are especially relevant for winter outdoor cabinets, cold-chain logistics, and remote systems that need predictable available energy in cold environments.
Lithium Plating Risk: AGM vs Standard LiFePO4 vs Low-Temperature LiFePO4
Low-temperature charging is one of the main engineering differences between lead-acid AGM batteries and LiFePO4 batteries. Standard LiFePO4 cells can be vulnerable to lithium plating when charged below their recommended temperature range. Lithium plating means metallic lithium deposits on the anode during cold charging, which may cause permanent capacity loss, higher internal resistance, shorter cycle life, and in severe cases additional safety risk. For this reason, many standard LiFePO4 battery management systems set a low-temperature charge cutoff around 0°C or -5°C.
AGM batteries do not have the same lithium plating mechanism, so they can often accept controlled charging below freezing more easily than ordinary LiFePO4 packs. This does not mean AGM is always the better low-temperature battery. A purpose-built low-temperature LiFePO4 or wide-temperature lithium battery can use low-temperature electrolyte design, optimized cell structure, heating film, temperature sensing, and a low-temperature BMS strategy to solve the cold-charge limitation while still keeping lithium advantages such as lighter weight, higher usable depth of discharge, longer cycle life, and better energy efficiency.
| Item | AGM Battery | Standard LiFePO4 Battery | Low-Temperature LiFePO4 / Wide-Temperature Lithium Battery |
|---|---|---|---|
| Low-temperature charging behavior | Can often accept controlled charging below freezing, within manufacturer limits. | Often restricted below 0°C or -5°C because of lithium plating risk. | Designed for cold charging with low-temperature cell chemistry, heating strategy, and BMS control. |
| Lithium plating risk | No lithium plating mechanism. | Main cold-charge concern; may cause irreversible capacity loss and safety risk. | Managed by cell design, temperature sensing, charge-current limits, and optional heating film. |
| Cold discharge performance | Tolerant of cold use but voltage sag and usable capacity can be limited. | Discharge may be acceptable, but standard cells lose performance at low temperature. | Optimized for low-temperature discharge and better usable energy in cold environments. |
| Weight and energy density | Heavy, lower usable energy per kilogram. | Lighter than AGM with higher usable energy. | Lighter than AGM while adding cold-weather design features. |
| Cycle life and depth of discharge | Lower cycle life and shallower practical depth of discharge in many applications. | Longer cycle life and deeper usable discharge than AGM under proper conditions. | Maintains lithium cycle-life advantage while extending cold-weather operating range. |
| Best use case | Simple cold-tolerant standby systems where weight and cycle life are less critical. | Normal-temperature lithium battery packs with BMS cold-charge protection. | Cold-chain, outdoor cabinets, winter solar lighting, telecom backup, field instruments, and other cold-region OEM packs. |
In short, ordinary AGM batteries usually tolerate extreme cold better than ordinary LiFePO4 batteries during charging, especially below freezing. However, a dedicated low-temperature LiFePO4 battery can address lithium plating risk through cell and BMS design, then outperform AGM in weight, usable capacity, cycle life, and deep-discharge capability for many cold-environment applications.
Cycle Life and Rate Capability
At 25±2°C, the cycle-life requirement is at least 80% capacity after 4,000 cycles under the listed 1C charge and 1C discharge method. At -10±2°C, the cycle-life requirement is at least 80% capacity after 1,000 cycles under the listed low-temperature charge and discharge method. The test summary also reports 85.11% average discharge capacity retention after 1,000 cycles at -10°C and 85.01% after 4,000 cycles at room temperature.
Application Fit
The WT27148154F-50LB is a strong candidate for cold-chain monitoring, refrigerated transport equipment, outdoor security systems, telecom backup cabinets, winter solar lighting, agricultural monitoring stations, marine electronics, and portable field instruments. The combination of LiFePO4 chemistry, 50Ah capacity, wide operating temperature range, and screw terminals makes it suitable for custom pack development rather than only single-cell replacement.
VTCBATT OEM/ODM Supply
VTCBATT supports factory-direct low-temperature battery projects with engineering review, cell matching, busbar and terminal layout, protection circuit selection, insulation and enclosure fit, custom labels, sample validation, and batch production. For equipment manufacturers, distributors, and system integrators, this helps convert the WT27148154F-50LB cell into an application-ready low-temperature LiFePO4 battery pack.
