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Product Description
The 18650 3.7V 500mAh Li-Ion Battery is a specialized, compact-capacity cylindrical energy cell engineered for ultra-low drain electronics, quick-charge indicator circuits, small backup modules, and educational prototyping kits. Delivering a nominal 3.7 volts with a 500mAh capacity, this lightweight battery provides steady, controlled energy output for low-current applications where space and light weight are prioritized over long runtimes.
Essential for powering tiny sensor nodes, low-power microcontrollers, LED indicator setups, and experimental electronic projects, this practical 18650 cell offers a specialized low-capacity option for custom workshop builds.
⚠️ Safety & Spot Welding Tip: When assembling multi-cell battery packs, always use pure nickel strips and a proper spot-welding machine rather than soldering directly to the battery terminals. Excessive heat can damage the internal chemistry and create a fire hazard.
Technical & Architectural Highlights
Compact 500mAh Capacity: Designed for ultra-low drain devices, experimental circuits, and lightweight testing rigs.
Reliable Lithium-Ion Chemistry: Maintains a steady 3.7V nominal voltage output (charging up to 4.2V max) with low self-discharge characteristics.
Standard 18650 Form Factor: 18mm diameter by 65mm length fits universally into standard 18650 battery holders, single-cell slots, and custom enclosures.
Specialized Low-Current Source: Ideal for educational demos, low-drain prototyping, and experimental workshop testing.
Technical Specifications
| Parameter | Value / Specification |
| Product Type | Rechargeable Lithium-Ion (Li-Ion) Cylindrical Cell |
| Cell Size | 18650 (18mm x 65mm) |
| Nominal Voltage | 3.7V DC |
| Full Charge Voltage | 4.2V DC |
| Capacity | 500 mAh |
| Chemistry | Lithium-ion |
| Terminal Type | Flat Top (Standard) |
Applications
Educational Kits & Demos: Powering low-current student projects, breadboard circuits, and basic electronics experiments.
Ultra-Low Drain Sensors: Operating lightweight monitoring units and indicator circuits with minimal power draw.
Workshop Prototyping: Serving as a temporary or specialized power source for testing custom low-voltage builds.
What’s in the Box
1 x 18650 3.7V 500mAh Li-Ion Battery.
All your electronics components, battery cells, and prototyping accessories are available with fast shipping across Egypt from Pro Tronix!
