Create3 Charging To Maximize Battery Life?

[slowrunner]

How are you connecting to your Create 3?

Wi-Fi and USB Ethernet (ROS 2)

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

Ubuntu 24.04

Which version of ROS 2 is installed on your computer?

Jazzy

Which firmware version is installed on your robot?

I.0.0

Which RMW is your robot running?

FastRTPS

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

/_do_not_use

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

Yes: 2.4GHz Home WiFi

Are there multiple Create 3 robots connected to your network?

No

Is multicast enabled?

Yes

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

USB

Describe your question.

It is suggested (for Electric Vehicles) that Li-Ion batteries be charged to 80% and discharged no more than 20%, to maximize battery life (about 3000-4000 cycles over 10 years for EVs).

Currently I have my "TB5-WaLI" (Turtlebot4 with a Raspberry Pi 5 - WallFollower Looking For Intelligence) remain charging on the dock till 99.5% charged (3.9 hours) and return to the dock at 18% charge (about 1.9 hours "playtime").

Is this going to shorten the battery life?

Is it realistic to expect 3000-4000 cycles (5 per day) making the battery last 2-3 years if I dock at 20% and undock at 80% charge?

[slowrunner]

Received this response from iRobot support:

You can safely charge the battery to 100% without worrying about shortening its lifespan. 
Lithium-ion batteries, like the one in your robot, are designed to handle full charges without significant degradation. 
However, it’s important to note that the overall battery life depends on how the robot is used. 
Factors such as cleaning frequency, runtime, and environmental conditions can all influence the battery’s longevity.

Additionally, please keep in mind that the typical lifespan of lithium-ion batteries is between 2 to 3 years.
Over time, it’s natural for the battery to gradually lose some capacity, but this is a normal part of its lifecycle.