Key Features
- 70A High Discharge: Handles extreme current draw with ease, supporting up to 70A continuous output.
- 4000mAh Capacity: Delivers extended runtime for e-bikes, tool packs, and power-intensive builds.
- Fast Charging Ready: Supports 8A max charge current for reduced downtime during use.
- Long Cycle Life: Retains 60% capacity after 600 cycles at 30A, ensuring performance longevity.
- Wide Operating Range: Discharges from -30°C to 75°C, ideal for harsh environments.
The Ampace JP40 is a rugged 21700 Li-ion cell engineered for demanding energy systems. With a 70A max continuous discharge, this cell is designed to push performance boundaries while maintaining thermal stability and long-term reliability. Whether you're building an EV battery pack or a high-drain industrial system, the JP40 offers a balanced combination of power, speed, and cycle life.
Applications/Uses
- e-Bikes & e-Motorcycles: Power systems that demand high output and thermal stability.
- Power Tool Packs: Reliable energy for heavy-duty applications with short burst requirements.
- Custom Energy Systems: Great for robotics, drones, and battery banks with extreme demands.
- Outdoor Equipment: Operates in cold or hot conditions without performance compromise.
- DIY Projects: Ideal for builders seeking top-tier high-drain 21700 cells.
SPECIFICATIONS
| Manufacturer: | Ampace |
| Model: | JP40 |
| Size: | 21700 |
| Positive Terminal: | Flat Top |
| Nominal Capacity: | 4000mAh |
| Continuous Discharge Rating: | 60A (No cutoff), 70A (with temp cutoff) |
| Pulse Discharge (5s): | 140A |
| Nominal Voltage: | 3.7V |
| Maximum Voltage: | 4.2V |
| Discharge Cut-Off Voltage: | 2.5V |
| Standard Charge Current: | 4A |
| Fast Charge Current: | 8A |
| Cycle Life: | >=2400mAh after 600 cycles @ 30A |
| Operating Temperature: | -30°C to 75°C (discharge) / 0°C to 60°C (charge) |
| Rechargeable: | Yes |
| Approx. Dimensions: | 21.1mm x 70.1mm |
| Approx. Weight: | 68g |
| Protected: | No, Unprotected |
| Country of Origin: | China |
| Data Sheet: | Ampace JP40 Datasheet |
⚠ Important Safety Warnings
Improper handling or misuse of this lithium-ion battery can result in FIRE, EXPLOSION, or THERMAL RUNAWAY, causing personal injury, property damage, or death. Users must read and follow all safety guidelines before purchase and use. Click here to review the full safety guidelines.
- Critical Warning: Never carry loose batteries in your pocket, purse, or bag. Loose batteries can come into contact with metal objects like keys or coins, causing a short circuit, which may result in severe burns, fire, or explosion. Always store or transport batteries in a protective case or box.
- Intended Use: This battery is designed for integration into protected battery packs with a Battery Management System (BMS) or Protection Circuit Board (PCB). It is not intended for standalone use or use in devices such as e-cigarettes or vaporizers.
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What is Thermal Runaway?
- A dangerous chain reaction where heat generated by a failing battery causes it to overheat further, potentially leading to fire or explosion.
- Causes: Overcharging, short circuits, physical damage, or exposure to high temperatures.
- Prevention: Use a smart charger, avoid physical damage, and store batteries in a cool, dry place.
- Storage & Transport: Always store batteries in protective cases or boxes to prevent accidental contact with metal objects. Never store loose batteries in pockets, purses, bags, or near conductive materials.
- Inspection: Do not use if the PVC wrapper, terminal insulator, or casing is damaged, dented, leaking, or bulging. These are signs of internal damage or instability, and continued use could result in failure, fire, or explosion.
- Charging: Use a smart charger designed specifically for lithium-ion batteries and ensure that the charger's voltage matches the battery's specifications. Never overcharge, over-discharge, or leave unattended while charging.
- Prohibited Activities: Do not short circuit, modify, puncture, crush, expose to liquids, or solder directly onto the battery (spot weld only).
- Emergency Response: If the battery shows signs of thermal runaway (e.g., smoke, swelling, or heat), immediately stop use and move it to a non-flammable surface (e.g., concrete or sand). For fires, use a Class D fire extinguisher or sand—never use water.
Disclaimer
IMR Batteries is not responsible for any damages, injuries, or claims arising from improper use, handling, or failure to follow these safety guidelines. Lithium-ion batteries require strict adherence to all safety protocols.
It is the reseller's responsibility to ensure all product warnings and safety guidelines are effectively communicated to their customers. Some cells are sold in bulk packaging and are not individually packaged. Resellers must provide appropriate packaging for each individual cell sold and must not distribute cells loose, unprotected, or without a proper storage box or case.
Product compatibility is the sole responsibility of the customer. IMR Batteries does not guarantee compatibility with any specific device or application. We are not responsible for the design, assembly, performance, or safety of any battery pack constructed using our cells. It is the customer’s responsibility to ensure proper cell matching, protection circuitry, configuration, and safe construction practices. Users and resellers assume full responsibility for the safe handling, usage, and distribution of this product.