Safe 12.8V power with double the capacity for your 12V devices and DIY projects.
This 18650 LiFePO4 (Lithium Iron Phosphate) Battery Pack features eight cells arranged in a 4S2P configuration (4 in series, 2 in parallel) within a compact rectangular layout. It delivers a stable 12.8V nominal voltage (14.6V full charge) and a doubled 3600mAh capacity.
Unlike standard 3.7V Li-ion cells, LiFePO4 chemistry offers superior thermal stability, an ultra-long cycle life, and a much lower risk of fire or explosion. It is an excellent rechargeable replacement for standard 12V lead-acid batteries, 12V solar lights, or devices requiring a 12V power source with extended runtime. It comes fully assembled with a built-in protection board (BMS) and pre-wired with red (positive) and black (negative) leads.
CRITICAL WARNING: Voltage Compatibility
This is a 4S LiFePO4 battery (12.8V nominal). You MUST use a dedicated LiFePO4 charger with a 14.6V cutoff. Never use a standard 4S Li-ion charger (16.8V) or a single-cell charger, as it will overcharge the battery and cause permanent damage or fire.
Key Features
LiFePO4 Chemistry: High thermal stability, excellent safety, and an ultra-long cycle life.
4S2P Configuration (12.8V / 3600mAh): Offers both the 12V voltage you need and double the capacity for longer runtime.
Compact 2x4 Rectangular Layout: Space-saving design (approx. 67mm x 74mm x 36mm) ideal for tight enclosures.
Built-in Protection Board (BMS): Protects against overcharge, over-discharge, over-current, and short circuits.
Pre-wired & Ready to Use: Comes with red (+) and black (-) leads for quick connection.
Parameters
*Dimensions are approximate and include the protection board and heat shrink wrap. Please allow ±1-2mm tolerance.
Applications
Recommended For:
12V Solar Lights: The ideal replacement battery for outdoor solar path lights and lawn lamps requiring longer runtime.
12V Devices: Perfect replacement for devices using 12V lead-acid batteries or 12V power sources.
DIY 12.8V Projects: Custom electronics requiring a stable 12V-12.8V power source.
Emergency Lighting: Reliable, safe power for 12V emergency lamps.
Not Recommended For:
Devices Requiring 14.8V/16.8V: This battery will not work properly in standard 4S Li-ion devices due to the lower voltage.
High-Drain Power Tools: Not suitable for tools requiring high burst currents.
Standard Li-ion Chargers: Never charge this with a 16.8V or 4.2V charger.
FAQ
Q1: Can I use my standard 4S Li-ion charger (16.8V) for this battery?
A: NO. You must use a dedicated LiFePO4 charger with a 14.6V cutoff. Using a 16.8V charger will overcharge and damage the battery, potentially causing a fire.
Q2: Why is the voltage 12.8V? I thought 4S was 14.8V.
A: This is a LiFePO4 battery, not a standard Li-ion battery. LiFePO4 cells have a nominal voltage of 3.2V (3.2V x 4 = 12.8V), with a max charge of 14.6V. Standard Li-ion is 3.7V/4.2V.
Q3: What does "4S2P" mean?
A: It means 4 cells in series (to quadruple the voltage to 12.8V) and 2 cells in parallel (to double the capacity to 3600mAh).
Q4: Can I use this to replace a 12V lead-acid battery?
A: Yes, it is an excellent, lighter, and longer-lasting replacement for 12V lead-acid batteries, provided your device's charging system is compatible with LiFePO4 (14.6V cutoff).
Q5: How should I connect the wires?
A: The red wire is positive (+) and the black wire is negative (-). Ensure correct polarity when connecting to your device.
