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.
| 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 |
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
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
