3S2P 18650 11.1V 5000mAh Rechargeable Cylindrical Li-ion Battery for LED Light Medical Instrument
Summary of 11.1V 18650 Battery Pack
The 3S2P 18650 11.1V 5000mAh Rechargeable Cylindrical Li-ion Battery is a lightweight, high-performance NMC (Nickel-Cobalt-Manganese) lithium-ion pack designed for LED lighting systems, medical instruments, and portable electronics.
Built using 18650 2500mAh cells, it delivers high energy density, stable 10A continuous discharge, and excellent cycle life — maintaining over 80% of its capacity after 500 cycles. With customizable voltage, capacity, BMS, connectors, and packaging options, this Li-ion battery pack offers outstanding flexibility and reliability for OEM and industrial applications.
3S2P 18650 Battery Pack Parameters
Battery Model: 18650 3S2P
Battery Type: Lithium Ion Battery
Nominal Voltage: 11.1V
Charge Voltage: 12.6V
Cut-off Voltage: 8.1V
Nominal Capacity: 5000mAh
Minimum Capacity: 4950mAh
Max Continuous Discharge Current: 10A
Peak Discharge Current: 20A
Max Charge Current: 5A
BMS Balancing: YES
Cycle Life: ≥500 Cycles @80% DOD
Weight: 305g
Size: 40*60*72 mm
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 & Advantages
🔋 High Energy Density & Lightweight NMC Cells
The 3S2P 11.1V battery pack uses Nickel-Cobalt-Manganese (NMC) lithium-ion cells, achieving a superior energy density compared to LiFePO4 and other chemistries.
Result: Higher capacity in the same size and lighter overall weight, enabling longer run times and improved portability — ideal for compact medical or lighting devices.
⚙️ 18650 Cell Structure — Efficient & Upgradeable Design
Each pack is built from six high-quality 18650 2500mAh cells (3S2P configuration), ensuring stable performance and balanced power output.
🔧 Custom upgrade option:
Same pack size can be upgraded to 7000mAh using 3500mAh 18650 cells — for applications requiring longer endurance and higher energy storage.
🔌 Stable Power Output — 10A Continuous Discharge
Engineered for reliability, this battery supports continuous discharge up to 10A, suitable for LED lighting systems, portable diagnostic devices, and other high-current medical instruments.
🔋 Optionally, the pack can be equipped with a high-performance BMS for overcurrent protection, temperature monitoring, and smart control.
♻️ High Cycle Life & Reliable Performance
With over 500 charge/discharge cycles, this Li-ion pack retains 80% of its original capacity, offering excellent cost-effectiveness and long-term durability.
Its low self-discharge rate ensures stable power supply during storage or standby operation.
⚡ Customizable Battery Pack Solutions
We support OEM & ODM customization to meet specific application needs.
🧩 Custom options include:
Voltage & Capacity configurations (e.g., 3S2P, 3S3P, 4S1P, etc.)
BMS upgrade (standard, smart, or Bluetooth-enabled)
Connectors & plugs
Labeling, shrink sleeve, and housing design
Branding, logo, and packaging customization
🌍 Safe, Reliable, and Environmentally Friendly
Built with certified NMC 18650 cells, the pack includes multiple protection features — overcharge, over-discharge, short circuit, and thermal protection.
Manufactured in compliance with UN38.3, CE, RoHS, and MSDS standards for global safety and transport approval.
🧠 Applications
The 3S2P 11.1V 5000mAh Li-ion battery pack is ideal for a wide range of devices that demand reliable, portable, and efficient power:
💡 LED lighting systems (portable and industrial)
🩺 Medical instruments (diagnostic tools, infusion pumps, portable analyzers)
📷 Inspection and imaging devices
🛠️ Portable testing equipment
📡 Wireless communication tools
🎧 Consumer electronics and smart tools
❓Frequently Asked Questions (FAQ)
Q1: Can this 11.1V Li-ion battery pack be customized for different capacities or voltages?
A: Yes. We support full customization — you can adjust cell count, BMS specs, voltage, and capacity to suit your application.
Q2: Is this battery suitable for high-current devices?
A: Absolutely. It supports 10A continuous discharge, with optional upgrades for higher current through enhanced BMS.
Q3: How long is the expected service life?
A: The pack retains over 80% capacity after 500 cycles, ensuring long-term, stable performance.
Q4: Can I use this battery in medical equipment?
A: Yes. It’s designed for medical-grade reliability, with low self-discharge, stable voltage, and safety certifications for secure operation.
Q5: What are the customization options available?
A: We can modify capacity, connectors, dimensions, labeling, BMS, shrink wrap, and packaging, and also provide OEM branding services.
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