I'm afraid I can't give you much more information. I separated my shoulder in a crash after 'casing' a jump a couple of months ago (sounds bigger and cleverer than it actually was) and haven't been back on any kind of MTB since (hoping to restart gently again soon). I definitely felt that battery performance was improved in the warmer weather but that (in any weather) once you get to three bars on the battery you'd better be heading home 'cos once you hit two bars you're only a few minutes away from one red bar and then on your own.
Hope you weren't caught in the recent floods!
Cheers
Iain
PS I haven't checked to see if there are any further firmware updates because I managed to set my bike to think it's in the US (well after my posts on this forum) and I don't want to risk going back to the 15mph limit. Even on a heavy ebike on flat single track I can hit this speed no problem and the on/off again assist is a pain. Around 20mph is much better and approximates the speed I'd rather be going on the flat. I don't think that this impacts the battery much because the amount of time spent exceeding 15mph is pretty small...
I hope your shoulder improves - keep going with the physio is my first-hand advice.
Concerning the EP8, bars and battery dropping from 30% -> 2% very quickly, I don’t have that experience.
I do see the last bar lasting less than the first four - about 40% as long as the previous 4 bars. If it’s cold, the battery endurance is reduced by a few %, but the pattern of discharge for each bar is unchanged. I’ve seen other reports on forums saying the same as I find, but irritatingly can’t find those with a quick look, sorry.
Here’s what I find on a trail I ride regularly (the exact figures are different on other trails, but tell the same story).
On one trail that uses up battery for me fairly uniformly, I get roughly 10km and 500ft climbing for each of the first 4 bars.
And then for that last bar, I’m only getting slightly less than half of that (about 5km and 300ft on that ride).
This is all repeatable and fairly frequently tested because I have two batteries which I use on longer rides, for example going round this trail twice (it doesn’t need all of both batteries). So, I do ride the first battery to empty on this ride - I’ve seen forum posts saying riding to empty is unwise, but battery health is holding up well.
Its been mentioned it might be the display firmware and that might be correct. My bike has the black and white unit (SC-E7000), not the colour one (SC-EM800).
I’ve used all this year’s firmware updates for the various parts of the system including the motor and none have altered how the battery discharges.
Get well and keep up the physio
