DC charging cables are commonly used by small electronics that have a round barrel jack or magnetic two-pin port. You’ll see them on:

• Portable speakers and sound equipment
• Older tablets, stylus pens, and e-readers
• Toys and hobby gadgets (like small RC items)
• Personal care and wellness devices (e.g., massagers)
• Wearables and heated gear (gloves, socks, hats) that use low-voltage packs
• Mini fans and certain compact projectors

Many options on this page connect USB power (often 5V) to DC plugs such as 5.5×2.1mm, 3.5×1.35mm, or 2.5mm, as well as magnetic heads. Always match the plug size, polarity, and the device’s voltage/current requirements for safe, reliable charging.

A DC charging cable delivers direct current from a USB power source to devices that accept a DC input. It’s often used to:

• Replace a lost or short OEM cord for a small device
• Power low-voltage electronics from a USB port, power bank, or wall adapter
• Connect a specific barrel jack (e.g., 5.5×2.1mm, 3.5×1.35mm, 2.5mm) or a magnetic two-pin port

Standard USB-A sources typically provide 5V, while some USB‑C Power Delivery setups can negotiate higher voltages when supported by both the adapter and cable. Before using any cable, check your device’s label or manual for connector size, polarity, voltage, and current needs. Matching these specs can help reduce mismatches and potential damage.

AC (alternating current) is what comes from the wall outlet, while most electronics run on DC (direct current). A power adapter converts AC to DC for your device. A DC charging cable doesn’t convert power on its own—it simply carries DC from a source (like a USB port or DC adapter) to your device.

• AC side: Wall power; requires an adapter to convert.
• DC side: The low-voltage output your device actually uses.

Some USB‑C PD systems can provide higher DC voltages when all components support it. Always verify your device’s required voltage/current and connector type. Using the correct setup can help maintain safe, stable charging, but results may vary by device and power source.

Start by checking your device’s label or manual for the exact connector size and polarity. If it uses a barrel jack, sizes are usually listed as outer diameter × inner diameter (for example, 5.5×2.1mm or 3.5×1.35mm). If you don’t have documentation, carefully measure the port or compare against the specs listed on this page.

• Match size: 2.5mm, 5.5×2.1mm, 3.5×1.35mm, etc.
• Match polarity: Look for the symbol indicating tip‑positive or tip‑negative.
• Match power: Confirm voltage and current requirements.
• Choose length: Pick a cord length that suits your setup.

Filters and product details can help you narrow options so the plug, polarity, and power all align with your device.

Some devices use a magnetic two-pin DC port instead of a barrel jack. Magnetic DC cables align with the metal contacts and snap into place for quick, low‑effort connections.

• Fit type: Check the contact style and size (e.g., 6mm, 7mm, or 10mm heads, round or oval bases).
• Polarity and spacing: Pins must match your device’s layout and polarity.
• Use case: Common for toys, massagers, wearables, and personal care items.

Before buying, compare your device’s port shape, diameter, and pin arrangement with the cable photos and specs. Keep contacts clean and dry, and avoid forcing a connection. Matching the correct head size and polarity supports a stable, reliable charge.