Replacement Cubes for Cozmo
Replacement Cubes for Cozmo are essential for keeping your robot interactive and responsive. Over time, cubes can become lost, scratched, or stop functioning due to battery wear.
With the re-release of Cozmo 2.0 and Vector 2.0, Digital Dream Labs now offers official replacement cubes that are compatible with both the new Cozmo and earlier editions, including the Classic and limited versions.
Where Can I Buy Replacement Cubes for Cozmo?
You can buy official Cozmo replacement cubes directly from Digital Dream Labs as singles or in a 3-pack.
Cozmo Cube Battery Replacement
Before buying a new cube, check whether the issue is just the battery. Each cube runs on a single Alkaline N / E90 / LR1 1.5-volt battery.
- ✅ Use only Alkaline N / E90 / LR1 batteries
- ❌ Do not use A23 batteries — they can damage the cube
- ❌ Do not use rechargeable batteries — also unsafe
Often, swapping in a fresh battery will bring a “dead” cube back to life.
How to Replace a Cozmo Cube Battery
Changing the battery is straightforward and requires just a screwdriver:
- Remove the single screw on the cube lid using a #2 Phillips screwdriver.
- Lift the cover and take out the old battery. Dispose of it safely.
- Insert one new N / E90 / LR1 1.5V Alkaline battery (positive end up).
- Replace the lid and tighten the screw gently — do not overtighten.
Troubleshooting Cozmo Cubes
If your cube isn’t working after a battery change, try the following:
- Reset the cube
- Remove the lid and battery, wait 10 seconds, then replace
- A healthy cube will flash Red → Green → Blue.
- Re-sync with Cozmo
- Keep the cube close to your robot.
- Open the app and go to Settings → Cube Status.
- If it shows “not connected,” select Auto Connect to Cubes to re-sync.
- Swap batteries between cubes
- Move a known working battery into the non-working cube to confirm whether the issue is power vs hardware.
If none of these steps fix the problem, reach out to official Cozmo support for assistance.
How long does a Cozmo cube battery last?
On average, the cube’s N / E90 / LR1 1.5V battery lasts about 20–40 hours of active play, depending on how much Cozmo interacts with it.
Why are the cubes numbered?
Cozmo interacts differently with each cube, so they are labeled #1, #2, and #3 for pairing and recognition. Replacement cubes are sold by number to match your set.
Do these cubes work with Vector?
Can I buy just one replacement cube?
Yes. Digital Dream Labs sells individual cubes (#1, #2, or #3), so you don’t need to replace the entire set if only one is missing.
How do I reset a cube?
Unscrew the lid, remove the battery for 10 seconds, then reinsert. A healthy cube will flash Red → Green → Blue. Check Settings → Cube Status in the app to re-sync.
Final Thoughts
Replacement cubes and the correct N / E90 / LR1 batteries keep your Cozmo robot working as intended. If your cubes are lost, damaged, or no longer responsive, the easiest solution is to order official replacements from Digital Dream Labs. With fresh batteries and compatible cubes, your Cozmo is ready for endless interactive play.