There are numerous threads on this topic that can found on this forum.
And rest assured, you are going to get a good dozen plus opinions about what you should do and what you should expect. Opinions from the neophyte to folks who work very close to the battery industry.
So let me be the first to say that you are likely going to be fine, if you have a battery from the upper tier ebike drive manufacturers like Bosch, Yamaha, Brose or Shimano. I cannot speak about the lower tier battery packs.
On my 400wh Yamaha battery, placed into service on March, 2017, I always charged to 100% until the BMS shut the charging process off. In summer, 2019, I supplemented that 400wh battery with 2 500wh Yamaha batteries to increase my mileage range on long day trips. Those 2 were also always charged to 100% and BMS shut off.
12 months of the year riding, in all 4 seasons. I see little to no battery degradation in any 3 batteries; if there is any, it's miniscule. I ride exclusively on the HIGH power position on my Habike Full FatSix's Yamaha PW drive. One thing I always do is to let the battery rest at room temp after each ride, before charging to 100%. Never will I charge following a ride in near 100 degree temps or sub freezing or in between. There have been times in the winter when the batteries have sat for over a month due to bad weather outside halting any riding activities. And they sat, charged at 100%. Most times, I ride every day or every other day. The three batteries are rotated in no particular order.
Lots to consider there, I know. But it's worked for me. YMMV. And I'm sure there might be a couple of folks who will dispute what I've noted here, but this has worked for me. I don't get hung up on charging to 75, 65 or 87%.
Thinking the original battery had about 6000-7000 some odd miles on it before getting the two 500's. Right now, the odometer reads 12,400 plus miles. No issues at all with the battery's or the charger.
I think you'll be fine.