I've got a tern e-bike with a Bosch motor, I love taking it on long rides. You've made a compelling case for replacing the existing battery, but what does the s

I've got a tern e-bike with a Bosch motor, I love taking it on long rides. You've made a compelling case for replacing the existing battery, but what does the story look like for replacing cells in 5 years? Do I have to replace them all at once? One at a time as they fail? Also, how swappable or parallel are the batteries? I'd love to be able to have two batteries for days when I want to ride 100 miles. My existing Bosch battery only has a ~60 mile range and I'd love to push that up. Also, do they have a usb port on the battery for power? Running lights, charging my phone, or powering a GoPro from the bike battery would be so helpful.