Description

The 3.7V 18500 2000mAh Li-ion Rechargeable Battery (Button Top) provides reliable, high-capacity rechargeable power for compatible portable electronics, flashlights, LED lighting equipment, and specialized battery-powered devices. Featuring lithium-ion chemistry, this cylindrical rechargeable battery delivers a nominal voltage of 3.7 volts and a rated capacity of 2000mAh, providing approximately 7.4 watt-hours of nominal energy. Its compact design offers an excellent combination of energy capacity, portability, and rechargeable performance for devices specifically designed to operate with 18500 lithium-ion batteries.

The 18500 battery features a raised positive button-top terminal for compatibility with devices requiring this contact configuration. Standard 18500 cells measure approximately 18mm in diameter and 50mm in length, although the overall dimensions of button-top versions can vary depending on terminal construction and whether a protection circuit is installed. Typical button-top batteries may measure approximately 18.2–18.6mm in diameter and 50–53.5mm in length. With a maximum charging voltage of 4.2V, this rechargeable lithium-ion battery must be charged using a compatible 4.2V lithium-ion charger. This product includes one 18500 3.7V 2000mAh rechargeable lithium-ion battery with a raised positive button-top terminal.

Specifications

Battery Size:	18500
Battery Type:	Rechargeable Lithium-Ion Battery
Chemistry:	Lithium-Ion (Li-ion)
Nominal Voltage:	3.7 Volt
Rated Capacity:	2000 mAh (2.0 Ah)
Nominal Energy:	7.4 Wh
Battery Format:	18500 Cylindrical Cell
Nominal Size:	18 mm Diameter × 50 mm Length
Approximate Diameter:	18.2–18.6 mm (0.717–0.732")
Approximate Overall Length:	50–53.5 mm (1.969–2.106"), Depending on Button-Top and Protection-Circuit Construction
Dimensions Note:	Exact Finished-Battery Dimensions Must Be Confirmed for the Specific Model
Terminal Style:	Raised Positive Button Top / Flat Negative Contact
Maximum Charging Voltage:	4.2 Volt
Charging Method:	Constant Current / Constant Voltage (CC/CV)
Compatible Charger:	4.2V Lithium-Ion Charger Supporting 18500 Batteries
Discharge Cutoff Voltage:	Model-Dependent; Follow the Battery Manufacturer's Specification
Maximum Continuous Discharge Current:	Model-Dependent; Verify Before Use in High-Drain Equipment
Protection Circuit:	Not Specified; Confirm Whether the Battery Is Protected or Unprotected
Typical Weight:	Approximately 32–35 g, Depending on Construction
Rechargeable:	Yes
Battery Quantity:	1 Battery
Packaging:	Single 18500 Button-Top Rechargeable Battery

Features

Key Features:

• 18500 rechargeable lithium-ion battery with raised positive button-top terminal
• Reliable 3.7-volt nominal output
• High-capacity 2000mAh rating
• Approximately 7.4Wh nominal energy capacity
• Rechargeable lithium-ion chemistry for repeated use
• Compact cylindrical design for compatible portable electronics
• Nominal 18500 size: 18mm diameter × 50mm length
• Approximate finished button-top dimensions of 18.2–18.6mm diameter × 50–53.5mm length, depending on construction
• Raised positive terminal for equipment requiring button-top battery contacts
• Maximum charging voltage of 4.2V
• Compatible with suitable lithium-ion CC/CV battery chargers
• High energy density compared with many conventional rechargeable battery chemistries
• No significant memory effect under normal use
• Suitable for compatible rechargeable flashlights and portable lighting equipment
• Useful for specialized electronic equipment requiring 18500 lithium-ion cells
• Reusable battery design can reduce frequent battery replacement
• Available for applications requiring a single 3.7V 18500 button-top rechargeable cell

COMPATIBILITY

Common Applications:

• Rechargeable Flashlights Designed for 18500 Li-ion Batteries
• Portable LED Lighting Equipment
• Specialized Handheld Electronic Devices
• Rechargeable Electronic Instruments
• Portable Measuring Equipment
• Industrial Electronic Devices
• Custom Battery-Powered Electronics
• Portable Monitoring Equipment
• Compatible Electronic Test Equipment
• Specialized Rechargeable Lighting Systems
• Battery-Powered Devices Requiring a Raised Positive Terminal
• Other Equipment Specifically Designed for 3.7V 18500 Lithium-Ion Button-Top Batteries

Battery Designations / Compatible Formats:

• 18500
• 18500 Li-ion
• 18500 Lithium-Ion Rechargeable
• 18500 Button Top
• 18500 2000mAh
• 3.7V 18500 Rechargeable Battery
• 3.6V / 3.7V 18500 Li-ion (Subject to Device and Charging Compatibility)
• ICR18500 / INR18500 (Only When the Specific Cell Chemistry, Discharge Rating, Protection, and Dimensions Are Compatible)

Important Compatibility Note:

• Verify that your equipment specifically requires a 3.7V 18500 rechargeable lithium-ion battery with a raised positive button-top terminal.
• DIMENSIONS: The nominal 18500 format is approximately 18mm in diameter by 50mm in length. Finished button-top batteries can be longer, especially when fitted with protection circuitry. Confirm the actual battery dimensions before purchasing.
• Protected and unprotected 18500 batteries are not automatically interchangeable. Verify whether the device requires built-in battery protection circuitry.
• The presence of a button-top terminal does not confirm that a battery includes a protection circuit.
• Do not substitute an 18650 battery, which is significantly longer, or an 18350 battery, which is shorter, unless specifically approved by the equipment manufacturer.
• Do not confuse this 3.7V lithium-ion battery with 3.2V LiFePO4 batteries or non-rechargeable 3V lithium batteries.
• Use only a compatible lithium-ion battery charger with a maximum charging voltage of 4.2V and appropriate charging current.
• Do not use chargers intended exclusively for NiMH, NiCd, LiFePO4, or other incompatible battery chemistries.
• Confirm the battery's maximum continuous discharge current before using it in flashlights, motors, or other high-drain equipment.
• Do not use loose, unprotected lithium-ion cells in equipment lacking appropriate overcharge, overdischarge, overcurrent, and short-circuit protection.
• Never charge or use a battery that is damaged, swollen, leaking, overheating, or showing other signs of abnormal operation.
• Do not short-circuit, puncture, crush, disassemble, or expose the battery to fire or excessive heat.
• Transport and store loose lithium-ion batteries in a suitable protective battery case to prevent accidental short circuits.
• Keep batteries away from children and pets.
• Recycle lithium-ion batteries through an approved rechargeable battery recycling program.

Package Includes:

• 1 × 18500 3.7 Volt 2000mAh Lithium-Ion Rechargeable Battery (Button Top)
• Total Quantity: 1 Battery
• Battery Charger Not Included