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Product Description
The UltraFire 18650 3.7V Rechargeable Lithium-Ion Battery (Red Edition) is an economical, entry-level power source designed for light, low-drain electronic applications such as basic LED flashlights, small laser pointers, desk mini fans, and simple DIY electronic toys. Featuring a distinctive red wrapper and a standard 18650 form factor with a button-top terminal, it provides an accessible power solution for everyday household gadgets and lightweight prototyping.
ℹ️ Honest Technical Note on Capacity & Usage: The “6800mAh” printed on the label is a commercial rating common among budget generic cells. In practical testing, actual real-world capacity for cells in this class ranges between 400mAh and 1200mAh. This cell is NOT intended for high-drain applications, custom battery pack building, power tools, or high-power motor drivers. For spot-welded battery packs, e-bikes, or high-current loads, we strongly recommend choosing high-drain Grade-A true-rated cells (like EVE or Samsung).
Technical & Practical Highlights
Budget-Friendly Power Solution: Low-cost red cell ideal for basic consumer gadgets and non-critical devices.
Standard 18650 Button-Top Design: Fits most standard 18650 single-cell holders and flashlight compartments.
3.7V Nominal Voltage: Standard operating voltage compatible with standard TP4056 single-cell charger modules and 1S charging docks.
Ideal for Low-Drain Loads: Best suited for low-current devices drawing under 0.5A to 1A continuous.
🧰 Soldering & Prototyping Essentials (Recommended Bundle)
Completing your low-power electronic project or testing setup? Add these essential bench tools and matching accessories to your order:
1S Lithium Battery Charger Modules (TP4056): Safe 5V Micro-USB / Type-C charging boards designed for 3.7V single-cell lithium batteries: Pro Tronix 1S Charger Collection
18650 Battery Holders & Clips: Single and dual 18650 battery holders with lead wires or PCB pins for easy breadboard connection: Pro Tronix 18650 Battery Holders Collection
DC Power Jacks & Sockets: Panel-mount and PCB-mount female DC barrel connectors for enclosure power inputs: Pro Tronix DC Sockets Collection
Lithium Battery Protection Boards (BMS): Essential 1S protection circuits to prevent over-discharge and short circuits: Pro Tronix BMS Modules Collection
KS-40R 40W Pencil Soldering Iron: Dependable benchtop soldering iron for assembling wire leads and connectors: Pro Tronix KS-40R Soldering Iron
Soldering Flux & Paste: Achieves clean, smooth solder joints on battery wires and terminal leads: Pro Tronix Soldering Flux Collection
Solderless Breadboard: Prototype testing circuits and voltage regulators quickly without permanent soldering: Pro Tronix Breadboards Collection
Jumper Wires & Cables: Connect battery holders, sensors, and modules effortlessly: Pro Tronix Wires & Cables Collection
Technical Specifications
| Parameter | Value / Specification |
| Brand / Model | UltraFire / 18650 (Red Edition) |
| Chemistry | Lithium-ion (Li-ion) |
| Labeled Nominal Capacity | 6800 mAh (Commercial Label Rating) |
| Nominal Voltage | 3.7V |
| Full Charge Cut-Off Voltage | 4.2V |
| Discharge Cut-Off Voltage | 2.75V |
| Terminal Type | Button-Top |
| Recommended Application | Low-Drain (Flashlights, Mini Fans, Laser Pens) |
| Dimensions | 18.5 mm (Diameter) x 67.0 mm (Height) |
Suitable Applications
Handheld Flashlights & Torches: Standard single-cell LED flashlights and headlamps.
Mini USB / Portable Fans: Low-current portable desk fans and cooling gadgets.
Laser Pointers & Toys: Small electronic toys and red/green laser pointers.
Simple Prototyping: Basic 3.7V microcontroller breadboard projects using standard 18650 battery clips.
What’s in the Box
1 x UltraFire 18650 3.7V Rechargeable Li-ion Battery (Red Edition).
All your electronics components and prototyping accessories are available with fast shipping across Egypt from Pro Tronix!
