Key Features
- High-capacity 3500mAh cell for extended runtime
- 5A maximum continuous discharge for steady output
- Protected button top design with built-in PCB safety
- Protection against overcharge, over-discharge, over-current, and short circuit
- Slightly longer than standard flat top 18650 cells due to the protection circuit
Note: This is a button top protected 18650 battery which is longer than a standard flat top unprotected 18650 battery.
Overview
Power compatible electronics with the XTAR 18650 3500mAh 5A battery, a premium protected lithium-ion cell designed for dependable performance and added safety. This button top battery includes an integrated protection circuit board (PCB) that helps guard against common electrical faults during charging and discharging. Because it is protected, it is longer than a standard unprotected flat top 18650—please confirm fitment before use. The outer wrapper and insulator are part of the safety system and must not be removed.
Note: This is a button top protected 18650 and is longer than a standard flat top unprotected 18650 due to the PCB.
Applications/Uses
- High-performance flashlights requiring button top 18650 batteries
- Portable electronics that specify protected 18650 cells
- Emergency preparedness and backup power setups
- Battery-powered devices used for outdoor and travel
- Compatible equipment where built-in battery protection is preferred
SPECIFICATIONS
| Manufacturer: | XTAR |
| Size: | 18650 |
| Positive Terminal: | Button Top |
| Protected: | Yes, PCB. |
| Nominal Capacity: | 3500mAh |
| Discharge Current: | 5A Maximum Continuous |
| Nominal Voltage: | 3.7V |
| Maximum Voltage: | 4.2V |
| Approx. Dimensions: | 18.3mm x 69.2mm |
| Approx. Weight: | 47.9g |
⚠ 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.