Plug-to-Plug Wire vs USB Cable: When to Use Each
By Circuit Cubes | Tenka Inc. | Published: 2026-10-18
Category: Comparisons
Compare the Plug-to-Plug Wire and USB Charging Cable for Circuit Cubes builds. Learn which cable powers your motor cubes and which one charges the battery.
Quick answer
Use the Plug-to-Plug Wire to connect your Bluetooth Battery to a Motor Cube for power. Use the USB Charging Cable only to recharge the battery itself.
Why the right cable matters
Circuit Cubes use two different cables for two different jobs. Mixing them up can leave a build without power or a battery that won't charge. The Plug-to-Plug Wire and the USB Charging Cable look similar but serve completely separate roles.
The Plug-to-Plug Wire is a short 6-inch connector that links a Bluetooth Battery to a Motor Cube. It completes the circuit so the motor can spin. The USB Charging Cable is a standard USB cord that connects the battery to a wall adapter or computer for recharging.
What happens if you use the wrong one
Plugging a USB cable between the battery and motor cube won't deliver power because the USB cable lacks the correct connector for the motor cube port. Conversely, using the Plug-to-Plug Wire to charge the battery won't work because it doesn't fit a USB power source.
Keep both cables in your kit but label them if you share with kids. The Plug-to-Plug Wire is for building; the USB Charging Cable is for maintenance.
Trade-offs at a glance
- Plug-to-Plug Wire (6 inch): Connects Bluetooth Battery to Motor Cube. Price: $2.21 (compare at $2.99). Essential for every motor-powered build; buy a spare if you build frequently.
- USB Charging Cable: Recharges the Bluetooth Battery via a standard USB port. Price: $0.58 (compare at $0.79). Inexpensive to replace; keep an extra in your kit so you never have a dead battery.
- Which to buy first?: If you already have a Bluetooth Battery and Motor Cube, you need the Plug-to-Plug Wire to make them work together. If you have the battery but no way to charge it, get the USB Cable. Most new builders need the Plug-to-Plug Wire first, then the USB Cable as a backup.
Cable details at a glance
- Plug-to-Plug Wire - 6 Inch / 15 cm: Purchase this wire to connect your Bluetooth Battery to Cubit Motor Cubes. Includes one 6-inch plug-to-plug wire. This is the only cable that bridges the battery and motor cube, so your build actually moves.
Plug-to-Plug Wire - 6 Inch / 15 cm - USB Charging Cable: The USB Charging Cable is a replacement or spare charging cable for your Circuit Cubes parts. Includes one USB cable. Without this cable you cannot recharge the Bluetooth Battery, which means your builds will stop working after the battery drains.
USB Charging Cable
Which cable fits your needs?
Best for
- Building a new motor-powered project that needs a connection between battery and motor cube
- Replacing a lost or broken charging cable to keep your battery working
Not for
- Charging the battery (use the USB Charging Cable instead)
- Powering a motor cube directly from a USB wall adapter (use the Plug-to-Plug Wire with a battery)
