5V to 21V Boost Charging Cable DC Interface USB Adapter

Keep your 21V battery-powered tools and devices topped up with this handy 5V to 21V Boost Charging Cable with DC Interface USB Adapter. Designed as a reliable replacement or spare, this cable steps up a standard 5V USB power source to the 21V output required by compatible battery packs — so you can charge on the go using any standard USB charger or power bank.

Key Features

• Universal Compatibility: Works with 21V battery packs that accept a 5V USB charging input via DC interface.
• Boost Technology: Steps up 5V USB power to 21V output for seamless, efficient charging.
• Durable Construction: Made from sturdy plastic housing with a cable length of approximately 73 cm — long enough for comfortable, flexible use.
• Replacement Ready: Ideal for replacing worn, damaged, or lost charging cables without needing to replace the entire battery or charger.
• Compact & Portable: Lightweight and easy to pack in a tool bag, backpack, or kit box.

Product Specifications

• Input Voltage: 5V (USB)
• Output Voltage: 21V (DC Interface)
• Cable Length: Approx. 73 cm
• Material: Plastic
• Applicable: 21V battery packs / 5V USB charging heads

What's in the Box

• 1 × 5V to 21V Boost Charging Cable with DC Interface USB Adapter

Note: The actual color of the item may vary slightly from product images due to differences in monitor brightness and display settings.

For general guidance on safe use of USB-based power accessories and charging standards, visit the U.S. Consumer Product Safety Commission (CPSC).

Frequently Asked Questions

Q: What does the 5V to 21V Boost Charging Cable USB Adapter do?

A: This boost charging cable steps up a standard 5V USB power input to a 21V DC output, allowing you to charge compatible 21V battery packs using any standard USB charger or power bank. It's a convenient and portable charging solution for tools and devices that use a 21V battery.

Q: What devices is this 5V to 21V USB Adapter compatible with?

A: This adapter is designed for use with 21V battery packs that support DC interface charging via a 5V USB source. It is commonly used as a replacement cable for cordless tool batteries and other 21V-compatible devices. Always verify your device's charging specifications before use.

Q: How long is the boost charging cable and what is it made of?

A: The cable measures approximately 73 cm in length and is constructed with a durable plastic housing, making it lightweight yet sturdy enough for everyday use and easy to carry in a tool bag or backpack.