Description
Ampace JP40 21700 Cell – 4000mAh – High-Power Tabless Lithium-Ion Battery - Check availability
The Ampace JP40 21700 4000mAh is a high-power lithium-ion cell designed for demanding builds that need strong current delivery, fast charging capability, and solid cycle durability.
With 4000mAh minimum standard discharge capacity, 3.7V nominal voltage, and up to 60A continuous discharge with 80°C temperature cut-off (45A without temperature cut-off), this cell is well suited for high-drain battery packs, drones, RC aircraft, power tool packs, e-bike systems, and custom performance battery assemblies.
This cell uses a 21700 cylindrical format and is best used in properly managed battery packs with temperature monitoring and suitable BMS/PCB protection. It is intended for users who need very high power density and dependable pack-level performance.
Specifications:
| Model | Ampace JP40 |
| Size | 21700 |
| Nominal Capacity | 4000mAh |
| Minimum Capacity | 4000mAh (standard discharge), 3900mAh at 40A rated discharge |
| Nominal Voltage | 3.7V |
| Max Voltage | 4.2V |
| Min Discharge Voltage | 2.5V |
| Max Continuous Discharge | 45A (without temperature cut-off) / 60A (with 80°C temperature cut-off) |
| Pulse Discharge | 140A (5s @ 25±3°C) |
| Standard Charge Current | 2A (0.5C) |
| Max Charge Current | 8A (2C rated charge) |
| Chemistry | Li-ion |
| Positive Terminal | Flat Top |
| Protected | No |
| Rechargeable | Yes |
| Initial Impedance | Max 4mΩ |
| Approx. Weight | 69.0g Max |
| Dimensions | 21.22mm diameter × 70.30mm height max |
| Operating Temperature | Charge: 0°C to 60°C / Discharge: -30°C to 75°C |
| Storage Condition | 0°C to 60°C within 1 month; 0°C to 45°C within 3 months; 0°C to 25°C within 12 months; ≤75% RH |
| Datasheet | Datasheet |
Applications:
- ✅ Racing E-Bikes
- ✅ Extreme-Load Battery Packs
- ✅ High-Output Power Tools
- ✅ Robotics and Mobility Systems
- ✅ Performance-Oriented Custom Builds
⚠️ Safety Warning for Lithium-Ion Battery Usage
Customers should understand proper lithium-ion battery handling before use. These cells can present fire, burn, or explosion hazards if short-circuited, overcharged, physically damaged, overheated, punctured, or used outside manufacturer specifications. Always charge on a fire-resistant surface and never leave charging batteries unattended.
By purchasing or using this battery, the user assumes responsibility for correct handling, pack integration, charging, temperature management, and protection. This cell is best used in a properly designed battery pack with appropriate BMS/PCB protection. Only use chargers and charging methods designed for this battery type, and never mix old and new cells in the same pack.
Important Usage Guidelines:
- Not for Use in E-Cigarettes or Similar Devices
- Use in a Properly Protected Pack
- Spot Weld Only – Do Not Solder Directly
- Monitor Temperature Under High Load
- Inspect Wrap and Insulator Ring Before Use
- Follow Manufacturer Specs Strictly
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Let customers speak for us
I purchased some of these tabless cells to try on my 1S 3" HD Toothpick drone build, and, albeit a bit heavy for 1S, it flies pretty well. Not a freestyle monster, but an endurance beast with decent send. These cells shrug off the demands of a BETAFPV Matrix HD AIO flight controller/12A ESC and some 1202.5 11000KV motors. I'm getting 15+ minutes of speedy flight time from a single cell trying not to go below 3.2V, and about 20+ minutes cruising. Love these cells and will definitely buy more when time comes, only from DIY500AMP, who are terrific!
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Highly efficient store specializing in authentic battery cells and welding supplies. Lightning-fast shipping (often same-day processing with 1-2 day delivery), competitive pricing, and exceptional customer service. Owner provides expert knowledge and personali...