Product Details
Is CALB 125Ah Right for Your Project?
A good choice for:
DIY 12V / 24V / 48V battery packs
Solar energy storage
RV and camper battery systems
Marine auxiliary power
Off-grid systems
Compact battery builds where a narrower cell format is useful
Build Your Battery Pack
| Configuration | Nominal Voltage | Energy |
|---|---|---|
| 4S / 4 Cells | 12.8V | 1.60kWh |
| 8S / 8 Cells | 25.6V | 3.20kWh |
| 16S / 16 Cells | 51.2V | 6.40kWh |
Technical Overview
| Specification | Value |
|---|---|
| Brand | CALB |
| Battery Chemistry | LiFePO4 (LFP) |
| Cell Type | Prismatic LiFePO4 Battery Cell |
| Nominal Voltage | 3.2V |
| Nominal Capacity | 125Ah |
| Nominal Energy | 400Wh |
| Internal Resistance | ≤ 0.5mΩ |
| Charge Cut-off Voltage | 3.65V |
| Discharge Cut-off Voltage | 2.5V (> 0°C); 2.0V (≤ 0°C) |
| Standard Charge Rate | 0.5C |
| Maximum Charge Rate | 1C |
| Standard Discharge Rate | 0.5C |
| Maximum Discharge Rate | 1C |
| Charging Temperature Range | 0°C to 60°C |
| Discharging Temperature Range | -20°C to 60°C |
| Dimensions (L × W × H) | 174.4 × 36.4 × 178 mm |
| Terminal Center Distance | 116 ± 0.3 mm |
| Approx. Cell Weight | 2.45 ± 0.15 kg |
| Cycle Life | ≥ 4,000 cycles |
| Capacity Retention | ≥ 80% |
| Cycle Test Conditions | 25°C ± 2°C, 0.5C charge / 0.5C discharge |
Cell Quality & Matching
Cells are supplied as brand-new Grade A CALB LiFePO4 cells. For multi-cell orders, AmpBird can check:
• Production batch consistency
• QR code and physical condition
• Open-circuit voltage
• Internal resistance
• Terminal condition
Capacity testing or specific matching requirements can also be discussed before ordering.
What's Included
For a 4-cell set:
4 × CALB LiFePO4 cells with welded threaded studs
4 × Busbars
（Epoxy insulation sheets available upon request）
Choosing a BMS
The BMS must match both your series configuration and the maximum current required by your system.
4S → 12.8V LiFePO4 BMS
8S → 25.6V LiFePO4 BMS
16S → 51.2V LiFePO4 BMSBMS current should be selected according to your inverter, charger and expected load — not simply the cell's Ah rating.
”Not sure which BMS you need? Contact AmpBird with your system voltage and inverter power.”
DDP Door-to-Door Shipping
We offer DDP shipping to eligible destinations. Customs clearance, import duties and applicable taxes are included, so no additional import charges are required upon delivery.
Your order will be delivered directly to your address by UPS, GLS or other local logistics partners.
“Please contact us to confirm DDP availability for your destination.”
When Your Cells Arrive
Inspect the packaging and cells before assembly. Check for visible damage, terminal condition and cell voltage.
If you notice shipping damage or an abnormal cell, contact AmpBird before installing or cycling the cells.
Why Choose AmpBird Cells
The foundation of every great battery build.
LiFePO4 Chemistry
Thermal stable, non-flammable, 3,000-8,000 cycle lifespan. The only safe choice for home energy storage.
Grade A Cells Only
Every cell batch-tested for capacity, internal resistance, and voltage before shipping. No B-grade, no surprises.
Deep Cycle Ready
Designed for 80% DoD daily discharge. Solar cycling, off-grid loads, and backup power -- built for real use.
-20℃ to 60℃ Operating
Wide temperature tolerance. Reliable in unheated garages, outdoor cabinets, and marine environments.
Compact Prismatic Form
Prismatic cells stack efficiently with minimal wasted space. Higher energy density than cylindrical cells.
Low Self-Discharge
< 3% monthly self-discharge rate. Store seasonally and come back to a full charge.
QUESTIONS & ANSWERS
