USB to CR2032 Dummy Battery Cable – 3V Coin Cell Power Adapter

Power Your CR2032 Devices Continuously via USB

Say goodbye to constantly swapping out coin cell batteries. This USB to CR2032 Dummy Battery Cable lets you power any CR2032 3V button cell device directly from a USB source — your power bank, laptop, wall adapter, or computer USB port. Simply insert the dummy battery shell into the device's battery compartment and plug the USB end into any 5V USB power source for a reliable, uninterrupted supply.

Key Features

• Eliminates Battery Changes: Runs CR2032-powered devices continuously without purchasing or replacing batteries — saves money and reduces waste.
• USB Input: 5V / 2A standard USB input, widely compatible with power banks, PC USB ports, and USB wall chargers.
• Regulated 3V Output: Precisely converts USB 5V to a stable 3V / 1A output that matches the CR2032 specification exactly.
• Long 100cm Cable: Approx. 100 cm (39.37 in / 3.28 ft) cable gives you plenty of reach from power source to device.
• Easy Color-Coded Wiring: Red wire = positive electrode, Black wire = negative electrode — no guesswork, simple setup.
• Compact & Lightweight: Small form factor and light build make it easy to use at home, on a desk, or on the go.
• Eco-Friendly: Reduces disposable battery waste for a greener everyday setup.

Specifications

Package Includes

• 1 × USB to CR2032 Dummy Battery Charging Cable

Compatible With

Any device designed to run on a standard CR2032 3V button coin cell battery — including remote controls, small clocks, LED lights, key fobs, sensors, and more.

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Learn more: EPA guidance on lithium-ion battery handling

Frequently Asked Questions

Q: What devices is this USB to CR2032 dummy battery cable compatible with?

A: This cable is compatible with any device that uses a standard CR2032 3V button coin cell battery. This includes small remote controls, mini LED lights, key fobs, electronic sensors, small clocks, and similar low-voltage devices powered by a single CR2032 cell.

Q: What USB power source do I need to use this cable?

A: The cable requires a standard USB power source providing 5V / 2A output. This includes USB wall adapters, laptop or desktop USB ports, and USB power banks — all very commonly available. The built-in regulator steps the voltage down to a stable 3V / 1A for your device.

Q: How long is the cable, and is it easy to set up?

A: The cable measures approximately 100 cm (about 39 inches / 3.28 feet), giving you good flexibility in positioning your device relative to a USB power source. Setup is straightforward: insert the dummy battery module into the CR2032 compartment and plug the USB connector into any compatible USB port. The color-coded wires (red = positive, black = negative) make polarity identification simple.

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.