Xain-USA 2-Pack 3.7V 3500mAh 18650 Button-Top Rechargeable Li-ion Batteries | 12.95Wh Each | Unprotected Cells – No BMS

Product Description

The Xain-USA 3.7V 3500mAh 18650 button-top rechargeable Li-ion batteries provide a nominal capacity of 3500mAh (12.95Wh) per cell for compatible electronic devices requiring 18650 button-top batteries.

Designed for rechargeable battery applications, these lithium-ion cells feature a button-top positive terminal and a nominal voltage of 3.7V.

Important: These are unprotected Li-ion cells without a built-in Battery Management System (BMS) or protection circuit. They must only be used in equipment specifically designed to accommodate unprotected 18650 cells with appropriate battery protection and charging controls.

Common Applications

Suitable for compatible electronic devices designed to use 3.7V 18650 button-top rechargeable Li-ion cells, including:

• Solar-powered lighting systems
• Compatible security cameras
• Portable speakers
• LED lighting equipment
• GPS devices
• Outdoor lighting systems
• Electronic equipment with appropriate Li-ion battery protection and charging controls

Compatibility Notice: Not all devices in these categories support unprotected 18650 batteries. Verify voltage, terminal type, dimensions, and protection requirements before purchasing.

Key Features

• 3500mAh Nominal Capacity: Each battery provides 3500mAh (12.95Wh) of rechargeable energy storage.
• 3.7V Nominal Voltage: Rechargeable Li-ion cell with a standard maximum charging voltage of 4.2V.
• 18650 Button-Top Design: Raised positive terminal for equipment requiring button-top 18650 batteries.
• High Energy Density: Compact rechargeable cell format suitable for compatible portable electronics.
• Rechargeable Li-ion Chemistry: Designed for repeated charging and discharging when used within manufacturer-specified operating limits.
• 2-Pack Configuration: Includes two individual 18650 button-top rechargeable batteries.
• Unprotected Cells – No BMS: No integrated protection circuit. Intended only for compatible equipment with appropriate protection and charging controls.

Technical Specifications

• Brand: Xain-USA
• Cell Type: 18650 Button Top
• Quantity: 2 Batteries
• Battery Chemistry: Rechargeable Lithium-ion (Li-ion)
• Nominal Voltage: 3.7V per battery
• Maximum Charge Voltage: 4.2V
• Nominal Capacity: 3500mAh per battery
• Energy: 12.95Wh per battery
• Combined Energy: 25.90Wh (2 Batteries)
• Positive Terminal: Button Top
• Discharge Cut-Off Voltage: 2.5V (subject to manufacturer verification)
• Charging Temperature Range: 0°C to 45°C (subject to manufacturer verification)
• Discharging Temperature Range: -20°C to 60°C (subject to manufacturer verification)
• Approximate Dimensions: 18.5mm × 67.5mm (subject to measurement confirmation)
• Approximate Weight: 45.5g per battery (subject to measurement confirmation)
• Rechargeable: Yes
• Protection Circuit: No – Unprotected
• Built-In BMS: No

Important Compatibility Information

These button-top 18650 batteries may be longer than standard flat-top 18650 cells.

Before purchasing, verify that your device:

• Requires a 3.7V rechargeable Li-ion 18650 battery.
• Uses a button-top positive terminal.
• Can accommodate the battery's physical dimensions.
• Supports the battery's electrical specifications.
• Is specifically designed to operate safely with unprotected 18650 cells.

To ensure the longevity and safety of your lithium-ion (Li-ion) batteries, follow these care instructions:

• Avoid Extreme Temperatures
• Partial Charge is Better
• Avoid Overcharging
• Minimize Exposure to High Discharge Rates
• Store Properly When Unused
• Use Proper Chargers and Cables
• Keep Battery Contacts Clean

We ship our products using USPS Ground Advantage 2-5 Delivery. Please note that USPS may experience delays in its network.

Refer to your receipt email for the tracking code to view updates.

Warranty: Products advertised with a one-year warranty are covered against manufacturing defects. Check this listing for the applicable warranty. Contact our U.S.-based team with your order number and photos for a warranty or performance issue.

Standard returns: Request within 30 days of delivery. Items must be unused, uninstalled and complete in their original packaging; exclusions apply.

Return shipping: The buyer pays return shipping and prints the label. For a damaged, defective or incorrect item, contact us first to confirm the resolution and shipping arrangements. A prepaid label is not automatic.

Read the full return policy and warranty guidance or email support@xain-usa-marketplace.com.