21700 Battery 5000mAh 3.6V Flat Top Li-ion Battery Cell
21700 Battery descriptions from the supplier:
⚠️ Warning:
1. Avoid Physical Damage: Impact, puncture, or compression may cause internal short circuits or failure.
2. Temperature Control: Operate/store within specified ranges (e.g., -40°C to 70°C). High temperatures accelerate degradation; extreme cold may trigger protective shutdowns.
3. Charge/Discharge Safely: Use only approved chargers. Overcharging or deep discharging permanently reduces cell lifespan.
4. No Tampering: Unauthorized disassembly risks damaging the solid-state electrolyte structure, leading to safety hazards.
5. Proper Disposal: Dispose of spent cells as electronic waste per regulations—do not discard or incinerate.
Note: If abnormalities occur (swelling, leakage, odor), power off immediately and isolate the cell.
Company Introduction
As a trusted supplier of lithium-ion battery cells, DEFNOCO specialize in sourcing and distributing high-quality Samsung 21700 batteries for global markets. With over a decade of experience in the energy storage industry, we ensure strict quality control, reliable supply chains, and OEM/ODM support for a wide range of applications. Our focus on performance, safety, and long cycle life makes us the preferred partner for power tool, consumer electronics, and lighting manufacturers.
21700 Battery Features
- High capacity 5000mAh 21700 battery with stable 3.6V nominal voltage
- Flat top design, compatible with most 21700 battery holders and devices
- Long cycle life of ≥1200 charge cycles for extended service life
- Built-in multi-protection: over charge, over discharge, over current, and short circuit protection
- Compact 21*70mm size and lightweight 70g design for easy integration
- Wide operating temperature range for reliable performance in various environments
- Ideal for power tools, LED lights, flashlights, and portable electronics
- 12-month warranty for peace of mind on every purchase
Product Specifications
| NO. | Item | Specification |
|---|---|---|
| 1 | Brand | Samsung |
| 2 | Product Name | 21700 Li-ion Battery |
| 3 | Model | Samsung 21700 5000mAh |
| 4 | Nominal Voltage | 3.6V |
| 5 | Dimension | 21 * 70 mm |
| 6 | Capacity Type | 5000mAh in 10% International Tolerance |
| 7 | Net Weight | 70g |
| 8 | Cycle Life | ≥1000 times |
| 9 | Warranty | 12 Months |
| 10 | Protection Function | Over Charge, Over Discharge, Over Current, Short Circuit, etc. |
| 11 | Application | Power Tools, LED Lights, Flashlight, etc. |
| 12 | Operation Temperature | Charging: 0~45°C; Discharging: -20~60°C |
21700 Battery Description
The Samsung 21700 battery is a high-performance lithium-ion cell with a 5000mAh capacity and 3.6V nominal voltage, designed for power-hungry applications. With a flat top design and standard 21*70mm dimensions, this 21700 li-ion battery is compatible with most power tools, LED lights, flashlights, and portable electronics. Its long cycle life of over 1000 times ensures consistent performance over years of use, while built-in protection against overcharge, over-discharge, over-current, and short circuits ensures safe operation.
The 70g lightweight design and wide operating temperature range make it suitable for both indoor and outdoor use. According to U.S. Department of Energy’s guide to lithium-ion batteries, cells like the 21700 are known for their higher energy density compared to older formats, making them ideal for applications where runtime and reliability are critical. Whether you’re powering cordless tools, LED lighting systems, or emergency flashlights, this 21700 battery delivers the capacity, safety, and longevity you need.
Brief Summary of Key Parameters
- Battery Type: 21700 li-ion battery cell, flat top design for wide compatibility
- Capacity: 5000mAh high capacity for longer runtime in power tools and devices
- Voltage: 3.6V nominal voltage, stable and reliable power output
- Dimensions: 21*70mm standard 21700 form factor, fits most battery holders
- Weight: 70g lightweight design, ideal for portable and handheld devices
- Cycle Life: ≥1200 charge cycles for long-term cost savings and performance
- Protection: Built-in multi-protection against overcharge, over-discharge, over-current, and short circuits
- Applications: Perfect for power tools, LED lights, flashlights, and consumer electronics
- Warranty: 12-month warranty for reliable after-sales support
Applications
- Cordless power tools including drills, saws, and grinders
- High-power LED flashlights, headlamps, and portable lighting systems
- Portable power banks and backup power supplies
- Electric bikes, scooters, and small electric vehicles
- Consumer electronics such as cameras, speakers, and handheld devices
- DIY battery packs for energy storage and hobby projects
