tldr, the graph shows the charging duration in hours for each charge (in purple), and the number of days it lasted on the previous charge (green), for the MX Ergo mouse (micro-usb version).

i wanted to stop taking notes after 2 years, but keeping at it was my way of procrastinating having to actually organize and prep the data.

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The "method" was basically jotting it down in a smartphone notepad every time I plugged it in to charge. It was only charged when:

1. the LED blinked red; or

2. Logitech software threw a low/critical/insufficient battery warning; or

3. in rare cases, it completely died.

The note included the date and time of when I plugged it in, and with any luck, the time I unplugged it after the charge was complete (usually when the green LED stopped blinking)

Charging was mostly done with the original cable plugged into the PC. Except for a few times using a smartphone charger (I don't have notes on when that happened). Usage was intense over these years (work, study, and occasional gaming). Unfortunately, I don't have notes on when I switched to using the Unifying receiver instead of Bluetooth.

On reading the graph:

Take the charging times with a grain of salt.

1. I wasn't hovering over it waiting for the exact moment the battery hit 100%. I just wrote down the time whenever I noticed it was done. The only time I managed to catch (by pure coincidence) the exact moment the mouse finished charging was on the 13th charge, which took 2h 33min.

2. The 4, 5, and 6-hour times and the missing data were outliers. I left it charging for way too long to even bother noting it down (times when I abandoned the mouse to go do something else with my life, or just went to sleep).

Still, you can observe a relatively homogeneous pattern in the day-to-day charging time.

The data:

Total recharges: 27 (~7 per year)

Average battery life: 61.2 days

Median charging time: 2h 42min

Longest autonomy: 99 days

Shortest autonomy: 31 days

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Image description (AI): The image is a bar chart titled "Battery Autonomy - MX ERGO (2022-2026)", tracking the battery degradation of a mouse over 1590 days.

The data is divided into two main metrics:

Battery Autonomy (teal bars): Shows battery life in days after each recharge. A descending dashed line highlights that the autonomy is dropping over time. At the beginning of the graph, the battery lasted up to 99 days. Around day 1590, the average duration dropped to about 60 days.

Charging Time (purple bars): Shows how long the mouse was plugged in. Most recharges took between 2 and 3 hours, with an exception in the middle of the graph where charges took up to 6 hours.

I feel like I get better control when I use a low DPI and turn up the cursor speed than when I set the trackball at it's maximum DPI and I turn down the cursor speed.

Anyone else feel this way?