Reliance RS40 3.6V 4000mAh 70A High Drain Fast Charge 14A 21700 Full Tab Cell
The RS40 Battery is a high-performance lithium-ion rechargeable power cell designed for long-lasting energy delivery and reliable performance. With a 4000mAh capacity and 70A maximum continuous discharge rate, this battery is ideal for high-demand applications, offering stable output and extended usage time.
Cell Characteristics
| Specification |
Value |
| Capacity |
Typical 4000mAh (14.4Wh) Minimum 4000mAh (14.4Wh) |
| Cell Voltage |
Nominal 3.6V Charge 4.2V Discharge 2.5V |
| Continuous Charge Current |
Standard 2A Maximum 14A |
| Continuous Discharge Current |
Standard 0.8A Maximum 70A |
| Ambient Temperature |
Charge -20~60℃ Discharge -40~80℃ |
| Impedance |
≤4mΩ |
| Weight |
67g |
| Dimension |
70.30mm(Max) * 21.35mm(Max) |
| Cycle life |
500cycle(80%) |
Key Features
- Extremely Low Internal Impedance: The full tab structure minimizes the current collection path, significantly reducing internal resistance compared to conventional cells
- Excellent Thermal Management: The uniform current distribution results in low and even heat generation
- High Discharge Rate: 70A continuous discharge, ideal for high-drain applications
- Lithium-Ion Chemistry: Provides stability, efficiency, and low internal resistance
- Rechargeable & Long-Lasting: Supports multiple charge cycles with minimal degradation
- Output Stability: Stable voltage curve during discharge ensures continuous power output
- Compact 21700 Size: Universally compatible with a wide range of electronic devices
Applications
- Aerospace: Provides lightweight, high-energy-density batteries for spacecraft, drones, UAV, and model aircraft
- Robotics: Supplies continuous power for high-load robots
- Lightweight Power Equipment: Assists with power for electric motorcycles, snowmobiles, electric bicycles, and other lightweight power tools
- Power Tools: Delivers high burst power for drills, angle grinders, electric saws, blow dryers, and other high-current tools
- Cleaning Appliances: Provides stable and lasting power for vacuum cleaners, mite removers, floor washers, steam mops, garden tools, and more, ensuring work efficiency and long battery life.
- Medical Electronics: Provides highly reliable power for life monitors, portable medical devices, and more
Warning
- Lithium-ion batteries require proper handling and knowledge to ensure safe operation
- Failure to follow safety guidelines may result in fire, explosion, serious injury, or property damage
- Only purchase and use if you fully understand lithium-ion battery safety
- Never leave a battery unattended while charging
- Keep away from animals and children
- Prevent contact with metal objects (keys, coins, tools) to avoid short circuits
- Inspect wraps and insulators regularly for damage - repair or dispose of damaged batteries immediately
- Resellers must pass these warnings to customers
- Typical cycle life of 200-500 cycles before noticeable capacity reduction - recycle at end of life
- Do not crush, incinerate, or modify batteries
- Only use within manufacturer specifications