Probably a silly question - but have you tried a battery reset?Now the other warranty replacement battery e8035 shows 11 cycles and 90% health. (I just received it a little over a month ago.) The other battery is still at 91% health at 7 cycles.
My wife's battery has a e8010 battery and it still shows 100% health at 9 cycles. It is almost 5 months old.
I think something is wrong with Shimano's e8035 batteries.
I do not know of a way to do a reset with a Shimano battery.Probably a silly question - but have you tried a battery reset?
Update1) # of charging cycles 17
2) remaining capacity 100%
3) I use E6000 charger exclusively
4) Battery BT-E8010 504wh
6) 12 months old / ~ 900 miles
I store the battery between 15-20 degrees celcius in a dark chamber and try to only charge it to 100% when I need it and then only right before I leave for the ride. I also try to avoid to fully empty it if it's not needed and if it happens I charge it up as fast as possible.
When I store it longterm then at 30-40%. I ride almost exclusively in Eco/High mode with 90-100 rpm and Im fairly light (around 70kg with gear). Boost-mode feels to strong anyway with that weight.
I would guess it means your battery has completed 97 full charge cycles (equivelant of a full charge and discharge).
Ive just hit 10cycles on an E8035, and dropped down to 90%. I would put money on this being a software issue rather than actual cell degradation given both the rapid nature which it has happened and that lots of others seem to have seen the same pattern.It seems that there is something wrong with BT-E8035 batteries. So far I've had 2 of these batteries and both have dropped capacity exactly the same way: 100%>90% at 10 cycles and 90%>87% at 20 cycles. Currently I'm at 24 cycles so let's see what happens at 30 cycles... On my previous bike I had 2 BT-E8010 batteries and one was at 92% after 80 cycles and the other at 100% after 20 cycles. I've handled all of these batteries exactly the same way: usually I ride until the bike shuts down and then use the fast charger to charge it to 100% after the battery has cooled/warmed to room temperature. I don't store it at 100% for a long time because usually I ride almost every day.