I’d add two tweaks that help knees: set your bike saddle so your knee has a slight bend at the bottom of the pedal stroke and always warm up 5 minutes and cool down 3–5 minutes. On walk days, pick flat, softer paths and use a slightly shorter stride. If you can, sprinkle in 10 minutes twice a week of simple strength like sit-to-stands and glute bridges, and calf raises to keep the joints happy.
I had the same late night scare before a work trip and it ended up being the outlet :) bathroom safety outlet had tripped so moving the setup to the kitchen told me right away what the problem was and then a quick reset and it charged.
Confirm the local voltage matches what your that model supports which, yeah, if you are traveling. sometimes the fix is boring and outside the brush. Done.
