Skywolfeye 18650 Li-Ion 3.7V 9900mAh Battery

Best For

• Compatible emergency lighting
• Compatible portable electronic devices
• Compatible power tools
• Replacing a rechargeable 3.7V 18650 battery

Not Ideal For

• Devices requiring a battery size other than 18650
• Devices that do not support rechargeable 3.7V lithium-ion batteries
• Applications requiring multiple batteries when only one is being purchased

Key Features

• Rechargeable Design: Can be recharged using a compatible charger made for 3.7V 18650 lithium-ion batteries.
• 18650 Battery Size: Designed for devices that accept the standard 18mm-diameter 18650 battery format.
• 3.7V Output: Intended for compatible equipment requiring a 3.7V rechargeable lithium-ion cell.
• Multiple Applications: Listed for compatible emergency lighting, portable devices, and power tools.
• Single-Battery Listing: Each purchase includes one individual battery.

Specifications

• Brand: Skywolfeye
• Model: 9900mAh
• Product Type: Rechargeable 18650 Battery
• Battery Chemistry: Lithium-Ion
• Battery Size: 18650
• Voltage: 3.7V
• Diameter: 18mm
• Listed Capacity: 8Ah
• Compatible Charger Types: Dual Charger or 828M Four-Slot Charger
• Country of Manufacture: China

Capacity Notice

The battery and model information identify this product as 9900mAh, while the supplied specifications also list a capacity of 8Ah. Because these capacity figures do not match, the exact rated capacity cannot be confirmed from the available information. Please consider this discrepancy before ordering.

Compatibility

Before ordering, verify that your device requires an 18650-size rechargeable lithium-ion battery with a nominal voltage of 3.7V. Battery dimensions, terminal style, protection circuitry, and device requirements should all be checked for compatibility.

What's Included

• One Skywolfeye 18650 3.7V rechargeable lithium-ion battery

Not Included

• Battery charger
• Additional batteries
• Emergency light, portable device, or power tool

FAQs

How many batteries are included?
This listing includes one individual Skywolfeye 18650 battery.

Is this battery rechargeable?
Yes. It is a rechargeable lithium-ion battery and requires a compatible charger designed for 3.7V 18650 cells.

Will this battery fit every device that uses an 18650 battery?
Compatibility is not guaranteed solely by the 18650 designation. Verify your device’s voltage, dimensions, terminal style, and battery requirements before ordering.

Is the charger included?
No. A compatible dual charger or 828M four-slot charger must be purchased separately.

Care & Safety

Use only a charger intended for rechargeable 3.7V 18650 lithium-ion batteries. Do not short-circuit, puncture, crush, disassemble, or expose the battery to fire or excessive heat. Do not use a battery that is swollen, leaking, damaged, or has a torn outer wrap. Keep batteries stored securely away from loose metal objects and out of reach of children.

Expert Insight

Confirm more than just the 18650 size before ordering. Voltage, terminal configuration, physical length, and protection requirements can vary between devices, even when the batteries share the same general size designation.