2000mAh 3.7V 18650 Li-Ion Rechargeable Battery

2000mAh 3.7V 18650 Li-Ion Rechargeable Battery is a cylindrical 18mm × 65mm rechargeable lithium-ion cell delivering a nominal voltage of 3.7V DC (4.2V full charge) and a rated capacity of 2000 mAh (7.40 Wh). Offering high energy density, zero memory effect, and 500+ charge-discharge cycles, it is designed for 2WD/4WD smart robot car kits, DIY 18650 power bank cases, rechargeable desk fans, and portable Bluetooth speakers.

Key Features:

• 2000 mAh Energy Storage (7.40 Wh): Provides reliable 3.7V DC power with more than 3× the voltage of a standard 1.2V NiMH AA cell.
• Standard 18650 Cylindrical Format (18 × 65mm): Fits all standard 1×, 2×, 3×, and 4× 18650 spring battery holders, DIY power bank cases, and 18650 cell spacers.
• 500+ Recharge Cycle Lifespan: Engineered for repeatable CC/CV charging up to 4.20V with low self-discharge during storage.
• High Discharge Capability: Supports up to 4.0A (2C) continuous discharge current for driving DC gear motors, Wi-Fi transceivers, and LED arrays.
• Compatible with TP4056 & BMS Boards: Pairs seamlessly with 1A TP4056 charger modules and 1S–6S 18650 BMS protection boards.

Technical Specifications:

• Cell Type: 18650 Cylindrical Lithium-Ion Rechargeable Cell
• Nominal Voltage: 3.7V DC
• Full Charge Voltage: 4.20V ± 0.05V (CC/CV)
• Discharge Cutoff Voltage: 2.75V to 3.0V DC
• Rated Capacity: 2000 mAh (7.40 Wh)
• Recommended Charge Current: 1.0A (0.5C) / 2.0A Max
• Max Continuous Discharge Current: 4.0A (2C)
• Operating Temperature: Charge: 0°C to +45°C | Discharge: -20°C to +60°C

Mechanical Specifications:

• Case Material: Nickel-Plated Steel Cylindrical Can with PVC Insulation Wrap
• Terminal Style: Standard 18650 Flat-Top Cylindrical Terminals

Dimensions:

• Diameter: 18.2 mm ± 0.2 mm
• Length: 65.0 mm ± 0.3 mm
• Weight: ~43 g

Pinout and Wiring:

• Positive Terminal (+): Top cap end (marked + on sleeve, with circumferential crimp groove).
• Negative Terminal (-): Flat bottom metal base can.
• Safety Note: Always use with a lithium battery charger (4.2V CC/CV) or BMS protection circuit; never short-circuit terminals or discharge below 2.75V.

Datasheet Reference:

• Cell Architecture: Cylindrical 18650 Lithium-Ion Intercalation Cell (3.7V Nominal / 4.2V Max)

Commonly Used in:

• 2WD / 4WD Arduino & L298N Smart Robot Car Kits
• DIY 5V USB Power Banks and 18650 Charger Enclosures
• Solar-Powered IoT Nodes and Garden Lanterns
• Rechargeable LED Torches, Portable Fans, and Bluetooth Speakers

Applications:

• Specifically suited for 2WD/4WD smart robot car kits, DIY 18650 power bank cases, rechargeable desk fans, and portable Bluetooth speakers.
• Can be wired in series (2S 7.4V, 3S 11.1V, 4S 14.8V) inside 18650 battery holders to power motor drivers, or in parallel (1S2P, 1S4P) for 5V power banks.
• Replaces disposable 9V or AA alkaline batteries with a rechargeable high-current lithium power source.

Equivalent Models:

• DMEGC INR18650-26E 3.7V 2600mAh Li-Ion Rechargeable Battery: Industrial 2600mAh 3C-rated 18650 cell.
• 3.7V 1200mAh Lithium Polymer Li-Po Rechargeable Battery: Flat-pouch LiPo alternative when a thin rectangular profile is required.

Package Includes:

• 1 × 2000mAh 3.7V 18650 Li-Ion Rechargeable Battery