Power your high-demand devices with the XTAR 21700 5000mAh 10A Battery, a robust and reliable energy source designed for advanced safety and superior performance. This battery features a protective circuit board (PCB) that shields against overcharging, over-discharging, over-current, and short circuits, ensuring optimal safety during use. With a high capacity of 5000mAh and a 10A maximum continuous discharge, it's perfect for powerful devices requiring sustained energy output. Note its extended length due to the button top and protection circuit, making it compatible with specific chargers like the Nitecore UMS2 and XTAR VC4SL.
Please note this is a button top protected 18650 battery and it is longer than a standard flat top 18650 battery. The PCB offers protection from over charge, over discharge, over current, and short circuit. This cell has an additional outer wrapper and insulator which must not be removed.
- High Capacity: Provides a significant 5000mAh to power through intensive tasks without frequent recharges.
- Advanced Protection: Equipped with a PCB for complete safety against overcharge, over-discharge, and more.
- High Discharge Rate: Delivers a steady 10A maximum continuous discharge, ideal for high-performance electronics.
- Specialized Compatibility: Due to its unique size (21mm x 74.6mm), compatible with specific chargers such as Nitecore UMS2 and XTAR VC4SL.
- Robust Build: Weighing 70.4g, its solid construction doesn't compromise on portability and fits securely in most compatible devices.
| Manufacturer: | XTAR |
| Size: | 21700 |
| Positive Terminal: | Button Top |
| Protected: | Yes, PCB. |
| Nominal Capacity: | 5000mAh |
| Discharge Current: | 10A Maximum Continuous |
| Nominal Voltage: | 3.6V |
| Maximum Voltage: | 4.2V |
| Approx. Dimensions: | 21mm x 74.6mm |
| Approx. Weight: | 70.4g |
| Country of Origin: | China |
⚠ Important Safety Warnings
While this battery is equipped with built-in protection circuitry to help prevent overcharging, over-discharging, and short circuits, improper handling or misuse can still result in FIRE, EXPLOSION, or THERMAL RUNAWAY, causing personal injury or property damage. Users must read and follow all safety guidelines before purchase and use. Click here to review the full safety guidelines.
- Intended Use: This battery is designed for use in flashlights, headlamps, and similar devices that require a button top configuration. Ensure compatibility with your device before use.
- Protection Circuit Limitations: While the protection circuit provides additional safety, it cannot prevent damage caused by misuse, including exposure to liquids, extreme heat, or physical damage.
- Storage & Transport: Always store batteries in protective cases to prevent accidental contact with metal objects (e.g., keys, coins, tools) that can cause a short circuit. Do not store loose batteries in pockets, bags, or other uncontrolled environments.
- Inspection: Do not use if the battery is dented, leaking, bulging, or if the outer wrapper or button top is damaged.
- Charging: Use a smart charger specifically designed for button top protected batteries. Do not exceed the battery's voltage and current specifications. Never leave the battery unattended while charging.
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Prohibited Activities:
- Do not expose the battery to water, fire, or high heat.
- Do not modify, puncture, crush, or attempt to disassemble the battery.
- Do not use the battery if it becomes unusually hot during use or charging.
- Emergency Response: If a cell shows signs of thermal runaway (e.g., smoke, swelling, hissing, or heat), stop use immediately and, if it can be done safely, move it to a non-flammable surface (e.g., concrete or sand) away from combustible materials. Lithium-ion cells burn as Class B fires — use an ABC / dry-chemical fire extinguisher, or douse with large amounts of water to cool the cell and prevent the fire from spreading. Do not rely on a small spray; thorough cooling is required, and cells can reignite from residual heat, so monitor the area afterward. (Class D extinguishers are intended for lithium-metal batteries, not lithium-ion.) For any fire beyond a single small cell, evacuate and call emergency services.
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.