12.8V 20Ah (256Wh) Lithium Iron Phosphate (LiFePO4) Portable Rechargeable Battery with UPS Function.
Power your devices with this 12.8V 20Ah (256Wh) LiFePO4 rechargeable battery, designed for reliability, safety, and portability. Using advanced Lithium Iron Phosphate (LiFePO4) technology, this battery delivers a longer lifespan, higher safety, and better performance than traditional lead-acid batteries.

Key Features
High Capacity
256Wh energy capacity (12.8V, 20Ah), suitable for a wide range of portable and backup power applications.
Lightweight Design
Weighs only 5.6 lbs, significantly lighter than comparable lead-acid batteries (~13 lbs).
Dual Input/Output Connectors
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5.5 × 2.5 mm DC female connector (center positive, outer negative)
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Anderson Powerpole connector (Red: positive, Black: negative)
These connectors support both charging and discharging.


Expandable Power Configuration
This battery supports both series and parallel connections thanks to its built-in protection circuitry:
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Series Connection (Max 4 units):
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2 batteries → 24V
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3 batteries → 36V
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4 batteries → 48V
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Parallel Connection:
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2 batteries → 12V 40Ah
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3 batteries → 12V 60Ah
⚠️ Important:
Only this battery and specially designed models support direct series or parallel connection. Unless explicitly stated, other BiXPower batteries must not be connected together.
Uninterruptible Power Supply Function
Reliable Backup with UPS Function
This battery supports simultaneous charging and discharging, making it perfect for uninterrupted power supply (UPS) applications. When connected to an AC charger, the system intelligently draws power from the charger, battery, or both—ensuring stable output for your devices.
The battery can be used while charging.
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Without AC charger: output is directly from battery cells (unregulated)
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With AC charger: output may come from the charger, battery, or both
Actual behavior depends on:
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Battery state of charge
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Load power demand

Advantages of LiFePO4 Technology
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Long Lifespan: 5–10 years (vs. 1–3 years for lead-acid)
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High Cycle Life: 1,000–3,000 cycles (vs. 200–1,000 for lead-acid)
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Deep Discharge Friendly: Can safely discharge to ~20% without damage
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Lightweight: Much lighter than lead-acid batteries
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Environmentally Friendly: No corrosive liquids or heavy metals
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High Safety: Extremely low risk of thermal runaway (fire)
Specifications:
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Model No.
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Chemistry
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- Lithium Iron Phosphate (LiFePO4)
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Voltage
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- Nominal Voltage: 12.8 V
- Minimum Voltage: 10V
- Maximum Voltage: 14.6V
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Capacity
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Continuous Discharge Current
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Maximum Discharge Current
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Size
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- 7.1" x 6.5" x 3" ( 178 x 165 x 75 mm)
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Weight
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Operate Temp. Charge
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Operate Temp. Discharge
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Storage Temp.
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Cycle Life
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PCB Safety Function
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- Cell balancing
- Over-discharge
- Over-current protection
- Over-charge
- Temperature protection
- Secondary protection
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Output Voltage Characteristics

- ully charged: 14.6V
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Nominal: 12.8V
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Typical operating range: 12V – 13.6V
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Cut-off voltage: ~10V
Voltage gradually decreases during discharge.
Charging
Included Charger: 14.6V 6A AC Charger

14.6V 6A AC Charger
With 14.6V 6A AC charger, the battery pack can
be fully charged in
less than 4 hours from any 100-240V AC power outlet.
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Full charge time: < 4 hours
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Input: 100–240V AC
⚠️ Charging Guidelines:
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Use only BiXPower-authorized chargers
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Charging voltage: 14.4V – 14.6V
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Max charging current: 10A
Package Includes
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12.8V 20Ah LiFePO4 Battery ×1
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14.6V 6A AC Charger ×1

(Optional carry bag available)
Optional Carry Bag:

Safety Guidelines
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Do not disassemble or modify the battery
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Avoid puncturing, crushing, or dropping
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Keep away from water and high heat (>60°C / 140°F)
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Do not insert foreign objects into ports
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Keep out of reach of children
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Dispose of properly per local regulations
⚠️ Misuse may cause heat, smoke, fire, or explosion.
Storage & Maintenance
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Store at 50%+ charge for long-term storage
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Use the battery at least once per month
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Perform full discharge/charge cycle every 3 months
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Store in a cool, dry place (0°C–20°C)