12V 18650 3S5P 15Ah Li-Ion Battery Pack for Solar LED Light
Summary of 12V 18650 3S5P 15Ah Battery
The 12V 18650 3S5P 15Ah Lithium-ion Battery Pack is a high-performance, long-endurance power source designed specifically for solar lighting systems, outdoor lamps, and portable energy storage devices. Built with pure NCM (Nickel-Cobalt-Manganese) cells, it provides high energy density, excellent cell consistency, and long cycle life. The integrated intelligent protection board (BMS) ensures safety through multiple protections—overcharge, over-discharge, overcurrent, short circuit, and overtemperature—while its active balancing function keeps every cell voltage stable. This 12V battery pack delivers efficient, safe, and durable power under all environmental conditions.
12V 18650 Battery Pack Parameters
Battery Model: ICR 18650
Battery Type: Lithium-ion Batteries
Battery Cell: 18650 3000mAh Cell
Nominal Voltage: 12V (11.1V)
Charge Voltage: 12.6V
Cut-off Voltage: 8.1V
Nominal Capacity: 15Ah
Minimum Capacity: 14.8Ah
Max Continuous Discharge Current: 5A
Peak Discharge Current: 10A
Max Charge Current: 5A
Cycle Life: ≥500 Cycles @80% DOD
Weight: 742g
Size: 104*69*70mm
Charging Temperature: 0°C to 50°C
Operating Temperature: -20°C to 65°C
Storage Temperature:
- -20℃~25℃: 12 months
- -20℃~45℃: 3 months
- -20℃~60 ℃: 1 month
Key Features – 3S5P Battery Pack 18650 12V 15Ah
🔋 High Energy Density with Pure Ternary NCM Cells
Constructed with pure NCM lithium-ion cells, this pack delivers superior energy density compared to standard chemistries.
Key advantages include:
High Wh/kg performance for maximum power output
Stable discharge voltage curve for consistent brightness in LED applications
Compact design that stores more energy in less space
Its pure ternary chemistry (LiNiMnCoO₂) ensures efficient, safe operation and reliable performance over hundreds of cycles.
🔆 Long-Lasting 15Ah Capacity for Continuous Lighting
With a large 15,000mAh capacity, the battery pack provides long runtime for solar-powered lights and similar low-power, long-duration devices.
You’ll benefit from:
Extended illumination time overnight
More autonomy during cloudy or rainy days
Reduced charging frequency
Perfect for solar LED street lights, garden lamps, pathway lighting, and portable lighting systems that demand stable, long-duration power supply.
⚙️ Built-In Smart Protection Board (BMS)
Safety and reliability are top priorities.
This 3S5P pack integrates an advanced BMS (Battery Management System) that provides six-layer protection:
✅ Overcharge protection
✅ Over-discharge protection
✅ Overcurrent protection
✅ Short-circuit protection
✅ Overtemperature protection
✅ Active balancing — ensures uniform cell voltage for longer pack life
The balancing function actively adjusts voltage differences between cells, preventing imbalance and prolonging battery lifespan.
🔁 Excellent Cell Consistency & Low Internal Resistance
Every 18650 cell in the pack is precisely matched for voltage, capacity, and internal resistance.
This results in:
Stable pack voltage and output power
Minimal heat generation during charge/discharge
Higher overall efficiency and energy retention
Such uniformity is crucial for multi-cell battery packs, ensuring high reliability, lower self-heating, and longer operational lifespan.
⚡ High Efficiency with 5A Continuous Discharge Support
Designed for reliable performance and long operation, this battery pack supports up to 5A continuous charge and discharge.
It provides:
Steady voltage output for solar lighting
High efficiency (≥95%) under continuous use
Stable performance for both daytime charging and nighttime operation
Ideal for devices that require stable power over extended periods, like solar systems, monitoring devices, and camping gear.
🌍 Wide Operating Temperature Range
This pack is built to withstand diverse environmental conditions:
❄️ Operates reliably from -20°C in cold climates
🔥 Remains stable up to +65°C in hot environments
It’s perfect for outdoor and off-grid applications, providing consistent performance in all seasons and weather conditions.
🧩 OEM Customization Available
As a direct manufacturer, Cestpower Battery offers OEM and ODM customization to meet your project’s specific requirements:
⚙️ Custom voltage, capacity, and configuration (3S–30S)
🏷️ Private label, logo printing, or custom PVC sleeve
🔌 Connector options: DC plug, XT30/XT60, JST, or custom type
📦 Custom packaging and housing support
🧠 Engineering support for BMS configuration and charger matching
Each pack is factory-tested for voltage, capacity, and safety compliance, ensuring consistent performance and reliability.
🏭 About Cestpower Battery
Cestpower Battery is a 18650 lithium battery manufacturer specializing in high-performance custom battery packs for solar, e-mobility, and industrial energy applications.
We guarantee:
🔋 Authentic, grade-A 18650 cells
🧪 Strict QC testing (voltage, capacity, internal resistance, cycle life)
🌍 Certifications: UN38.3, CE, MSDS, RoHS
🤝 Direct factory pricing & full technical support
❓Frequently Asked Questions (FAQ)
Q1: What devices can this battery power?
A: It’s ideal for solar LED lights, outdoor lighting systems, garden lamps, pathway lights, and other off-grid DC devices requiring 12V output.
Q2: Does the battery include a protection circuit?
A: Yes. It comes with a smart BMS that provides overcharge, over-discharge, overcurrent, short-circuit, and overtemperature protection, plus active cell balancing.
Q3: Can I order a customized battery pack?
A: Absolutely. Cestpower Battery supports OEM and ODM customization including voltage, capacity, label printing, connector type, and PVC color.
Q4: How long does the battery last?
A: With proper use, the pack can last over 500 cycles, retaining 80% or more of its original capacity.
Q5: What charger should I use?
A: Use a 12.6V Li-ion balance charger specifically designed for 3S battery packs for safety.
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