Battery compatibility

[alexswerner]

How are you connecting to your Create 3?

USB Ethernet (ROS 2)

Computer(s) Model(s) and Operating System(s)

No response

Which version of ROS 2 is installed on your computer?

None

Which firmware version is installed on your robot?

H.2.6

Which RMW is your robot running?

FastRTPS

Does your robot have an assigned namespace? If so, please share.

No response

Is the robot connected to a network? If so, what is the network type?

No response

Are there multiple Create 3 robots connected to your network?

None

Is multicast enabled?

None

What is the Adapter Board's USB/BLE Toggle currently switched to?

None

Describe your question.

Hi,

I'm wondering if I can get certainty about the battery compatibility of the Create3. @shamlian stated in Question #383 that the Roomba Combo™ j7+ should be compatible and have twice the capacity. This would be very helpful in our application. Can I get a confirmation that (a) this battery is compatible and (b) has actually twice the capacity.

Thanks!

[shamlian]

I can confirm that this battery is rated to 64.2 Wh and when plugged into a Create 3 robot shows, on the info page,

>>>>>>> system battery
Percentage:24
Capacity(mAh):4740

It appears to be charging as normal.

The battery I previously had in my robot (originally as shipped) showed

Capacity(mAh):1927

This is roughly 2.5x the capacity of the original battery.

The robot by itself should fully charge as expected. However, depending on the hotel load of other things plugged into the system, the battery may not charge fast enough to satisfy the robot's safety system, and the robot may stop charging before it is fully charged (this is a safety feature). In this case, simply backing the robot off and then back onto the dock should get it to start charging again. Current into or out of the battery is available in the /battery_state topic.

I will update this if I have any trouble.