Product Specifications for LiFePO4 Rechargeable Battery | 6V 5.4Ah 32.4Wh - Lead Acid Replacement, UN38.3 Passed
| BM Part #: | LF-LA6V5.4A |
|---|---|
| Voltage: | 6.4 Volt |
| Capacity: | 5.4 Ah |
| Energy Capacity: | 32.4 Wh |
| Type: | LiFePO4 |
| Length: | 2.76" |
| Width: | 1.85" |
| Height: | 3.78" |
| Shipping Weight: | 1.30Lbs |
| Warranty: | 1 Year |
| Safety Certification: | UN38.3 Passed |
- Direct lead acid replacement in a lighter, longer-lasting package — designed as a drop-in upgrade for 6V SLA applications; LiFePO4 chemistry delivers significantly more cycle life and substantially lower weight (12 oz.) than equivalent sealed lead acid batteries.
- UN38.3 safety tested and passed — independently verified for transport safety compliance; suitable for air, ground, and sea shipment under applicable lithium battery regulations.
- Flexible charge and discharge rates — standard charge at 1.08A (6–7 hours) or fast charge at up to 5A (3–4 hours); discharge supports up to 5A continuous across -20°C to +60°C operating range.
- 6.4V nominal / 7.2V maximum charge voltage — LiFePO4 chemistry nominally runs at 6.4V (two cells in series at 3.2V each); serves as a functional replacement for 6V lead acid batteries while offering a flatter, more stable discharge curve.
- Compact form factor: 70 × 47 × 96mm, 12 oz. — significantly lighter than SLA equivalents of similar capacity; suitable for portable, mobile, and space-constrained installations.
Product Description
The LF-LA6V5.4A is a Lithium Iron Phosphate (LiFePO4) rechargeable battery designed as a direct upgrade replacement for 6V sealed lead acid (SLA) batteries. At 6.4V nominal / 5.4Ah / 32.4Wh, it delivers reliable rechargeable power in a compact, lightweight package — with UN38.3 safety certification for transport compliance.
Why Replace Lead Acid with LiFePO4?
LiFePO4 chemistry offers several practical advantages over sealed lead acid in replacement applications:
- Weight: At 12 oz., this battery is significantly lighter than a 6V SLA battery of comparable capacity
- Cycle life: LiFePO4 chemistry supports substantially more charge cycles than SLA, reducing long-term replacement frequency
- Discharge curve: Flatter, more stable voltage output across the discharge cycle compared to SLA
- Temperature performance: Discharge rated to -20°C, suitable for cold-weather installations where SLA performance degrades significantly
Voltage Note
This battery has a nominal voltage of 6.4V (two LiFePO4 cells in series at 3.2V nominal each), with a maximum charge voltage of 7.2V ± 0.25V and an end voltage of 5V ± 0.1V. It is designed to serve as a functional replacement for 6V lead acid batteries. Confirm compatibility with your application's voltage tolerance before installation, and ensure your charger is rated for 6.4V LiFePO4 chemistry — do not use a lead acid charger with this battery.
Charging
Standard charge current is 1.08A with a charge time of 6–7 hours. Maximum charge current is 5A with a charge time of 3–4 hours. Charging must be performed between 0°C and 40°C. Compatible 6.4V LiFePO4 smart chargers are available separately.
Storage Guidelines
Storage temperature varies by duration:
- Up to 1 month: -20°C to +60°C
- Up to 3 months: -20°C to +45°C
- Up to 12 months: -20°C to +20°C
For long-term storage, keep the battery in a cool environment at partial charge (approximately 50% state of charge) to maximize shelf life.
⚠️ California residents: This product contains chemicals known to the State of California to cause cancer and reproductive harm. See Prop 65 Warnings.
Frequently Asked Questions
Can this battery replace my 6V sealed lead acid (SLA) battery?
In many applications, yes — but there are important considerations. The nominal voltage of this LiFePO4 battery is 6.4V, not 6.0V, and the maximum charge voltage is 7.2V. Your application and charger must be compatible with LiFePO4 voltage characteristics. Do not use a lead acid charger with this battery — use a charger specifically rated for 6.4V LiFePO4 chemistry.
What is the difference between LiFePO4 and standard lithium-ion?
LiFePO4 (Lithium Iron Phosphate) is a specific lithium chemistry known for its thermal stability, long cycle life, and relatively flat discharge voltage curve. Compared to standard lithium-ion (NMC or NCA), LiFePO4 is more thermally stable, has a lower energy density, and is better suited for applications prioritizing safety and longevity over maximum energy per unit weight.
What charger should I use with this battery?
Use a charger specifically designed for 6.4V LiFePO4 battery packs. Do not use a lead acid charger or a charger designed for other lithium chemistries. Compatible smart chargers are available separately — contact us for recommendations.
What does UN38.3 certification mean?
UN38.3 is an international standard for the transport testing of lithium batteries. A battery that has passed UN38.3 testing has been verified to meet safety requirements for air, ground, and sea shipment under applicable transport regulations. It does not indicate a specific performance rating.
How should I store this battery long-term?
For storage up to 12 months, keep the battery between -20°C and +20°C. For shorter storage periods, a wider temperature range is acceptable — up to +45°C for 3 months and up to +60°C for 1 month. Store at approximately 50% state of charge for best long-term results.
Is this battery subject to Prop 65 warnings?
Yes. This product contains chemicals known to the State of California to cause cancer and reproductive harm. See p65warnings.ca.gov for more information.
