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Product Description
The 18650 3.7V 2500mAh Li-Ion Battery is a reliable, standard-capacity cylindrical rechargeable energy cell engineered for everyday electronics, portable power banks, and DIY prototyping projects. Delivering a nominal 3.7 volts with a dependable 2500mAh capacity, this versatile battery provides steady, consistent power output and excellent cycle life for a wide range of electronic devices.
Essential for powering custom microcontroller rigs, handheld instruments, portable LED lights, and custom multi-cell battery packs, this dependable 18650 cell combines stable performance with great value.
⚠️ 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
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Reliable 2500mAh Capacity: Provides consistent runtimes and dependable energy storage for everyday electronic devices and prototyping builds.
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Stable Lithium-Ion Chemistry: Maintains a steady 3.7V nominal voltage output (charging up to 4.2V max) with low self-discharge rates.
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Standard 18650 Form Factor: 18mm diameter by 65mm length fits universally into standard battery holders, single-cell slots, and custom enclosures.
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Versatile Power Source: Easily integrated into single-cell projects or combined into series/parallel multi-cell configurations.
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 | 2500 mAh |
| Chemistry | Lithium-ion |
| Terminal Type | Flat Top (Standard) |
Applications
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Microcontroller & IoT Projects: Powering portable Arduino, ESP32, or sensor nodes with step-up/step-down regulator modules.
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Flashlights & Portable Gear: Replacing standard cells in flashlights, headlamps, and handheld test equipment.
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Custom Power Packs: Building multi-cell 3.7V, 7.4V, or 11.1V battery banks for robotics and custom electronics.
What’s in the Box
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1 x 18650 3.7V 2500mAh Li-Ion Battery.
All your electronics components, battery cells, and prototyping accessories are available with fast shipping across Egypt from Pro Tronix!
