Description
Power up your advanced devices with the MXJO 21700 4000mAh Battery, designed to deliver reliable and long-lasting performance. This high-capacity, flat-top battery is ideal for various applications requiring a robust energy source. With a 20A maximum continuous discharge and 30A pulse discharge capability, it ensures optimal performance under high-demand conditions. Note that this unprotected cell must be used within protected battery packs to ensure safety and effectiveness.
- High Capacity: 4000mAh for extended runtime in high-demand applications, ensuring you stay powered longer.
- High Discharge Rate: 20A maximum continuous and 30A pulse discharge rates for demanding electronics and tools.
- Unprotected Cell: Ideal for use in protected battery packs, requiring a PCB or BMS for safe operation (not included).
- Versatile Use: Standard 21700 size (21.7mm x 71mm) fits a variety of devices, making it a flexible power solution.
- Durable and Lightweight: Weighs only 69g, making it suitable for portable applications without adding excessive weight.
SPECIFICATIONS
| Manufacturer: | MXJO |
| Size: | 21700 |
| Positive Terminal: | Flat Top |
| Nominal Capacity: | 4000mAh |
| Continuous Discharge Rating (max): | 20A Maximum Continuous, Rated 30A Maximum Pulse by MXJO |
| Nominal Voltage: | 3.7V |
| Maximum Voltage: | 4.2V |
| Protected: | NO, UNPROTECTED. |
| Rechargeable: | Yes |
| Approx. Dimensions: | 21.7m x 71mm |
| Approx. Weight: | 69g (MAX) |
| Country of Origin: | China |
⚠ 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.
- 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 for e-cigarettes, vaporizers, or similar devices.
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Thermal Runaway: A chain reaction where heat from a failing battery
causes further overheating, potentially leading to fire or explosion.
- Causes: Overcharging, short circuits, physical damage, or exposure to high temperatures.
- Prevention: Use a smart charger, avoid damage, and store batteries in a cool, dry place.
- Storage & Transport: Always store batteries in protective cases 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. Continued use could result in failure, fire, or explosion.
- Charging: Use a smart charger specifically designed for lithium-ion batteries and ensure the charger's voltage matches the battery's specifications. Never overcharge, over-discharge, or leave unattended while charging.
-
Prohibited Activities:
- Do not expose the battery to extreme heat, fire, or liquids.
- Do not short circuit, puncture, crush, or modify the battery.
- Do not charge or discharge beyond the manufacturer’s voltage range.
- Do not dispose of in regular trash—always recycle at approved facilities.
- Emergency Response: If the battery overheats, emits smoke, or swells, move it to a non-flammable surface (e.g., sand or concrete) and stop use immediately. In case of fire, use a Class D fire extinguisher or sand. Do not use water.
Disclaimer
18650Battery.com 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 safety warnings and product guidelines are effectively communicated to customers. Users and resellers assume full responsibility for the safe handling, usage, and distribution of this product.