USB 5V to 3V Battery Eliminator Power Supply Cable
USB 5V to 3V Battery Eliminator Power Supply Cable
Never Replace AA Batteries Again
Say goodbye to disposable batteries! This USB 5V to 3V Battery Eliminator Cable converts standard 5V USB power into a steady 3V output, giving your everyday devices a continuous, reliable power source through any USB port or adapter. Made in Mainland China.
Whether you're powering remote controls, LED holiday lights, digital clocks, wireless keyboards, electronic door locks, or portable fans — this smart cable keeps your devices running without the hassle or cost of constantly swapping out batteries.
Key Features
- ✅ Eliminates disposable batteries — powered continuously via any standard USB port (5V/2A input)
- ✅ Stable 3V output — equivalent to two 1.5V AA cells in series
- ✅ Color-coded polarity wires (+/-) for easy, mistake-free installation
- ✅ Includes 1 green dummy/fake battery for secure fit in standard battery compartments
- ✅ Available in two cable lengths — 100cm (39 inches) or 200cm (78.74 inches)
- ✅ Durable plastic construction built for everyday home, office, and travel use
Specifications
| Input | USB 5V / 2A |
| Output | 3V / 1A (virtual 3V battery) |
| Cable Length | 100cm (39 in) or 200cm (78.74 in) — optional |
| Battery Replacement | Replaces 2× 1.5V AA cells |
| Country of Origin | Made in Mainland China |
What's in the Box
- 1× USB 5V to 3V Power Cord
- 1× Green Dummy/Fake Battery
Perfect For
- Remote controls (TV, AC, fans, etc.)
- LED holiday string lights
- Digital clocks
- Wireless keyboards & mice
- Electronic door locks
- Portable fans & small gadgets
Looking for more home and gadget essentials? Check out our 10-Piece Gardening Tool Kit and our handy 105° Right Angle Driver with Hex Screwdriver Bit for your home toolkit.
Learn more: EPA guidance on lithium-ion battery handling
Frequently Asked Questions
Q: What devices is this USB battery eliminator cable compatible with?
A: This USB 5V to 3V battery eliminator is compatible with any device that runs on two 1.5V AA batteries in series (totaling 3V). Common examples include remote controls, LED holiday lights, digital clocks, portable fans, wireless keyboards, and electronic door locks. Always verify your device's voltage requirement before use.
Q: Do I need a special USB adapter to use this cable?
A: No special adapter is required. Simply plug the USB end into any standard 5V USB power source — such as a USB wall adapter (5V/2A recommended), a computer USB port, or a USB power bank — and the cable will convert the output to a stable 3V for your device.
Q: How does the dummy battery work?
A: The included green dummy (fake) battery is designed to fit securely inside your device's battery compartment, replacing one of the AA battery slots. It acts as a conductor and spacer, ensuring a proper electrical connection while the power is supplied via the USB cable.
Q: Which cable length should I choose — 100cm or 200cm?
A: Choose 100cm (39 inches) for most desktop or close-range setups, such as a clock or remote holder near a USB outlet. Opt for the 200cm (78.74 inches) length if your device is further from the nearest USB power source, such as a wall-mounted clock or holiday lights.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.