Well, I know some people do really nurse these LITHIUM beauties like they are living things. My problem with that treatment is that most of my rides seem to exceed 50% capacity. So after every ride I recharge the Main battery. I don't know the ultimate impact of such charging over the life of the battery. There are all these "rules" about how low or how high the battery charge should be. I have to hope that if I really kill the Main battery prematurely that Specialized will have replacement batteries. I know inventory is a problem now with most bike parts and circuit boards (and in all kinds of other industries) but again, hopefully, this will be resolved when my battery needs replacement.
If I chose to ignore the weight issue, I guess I could predominately use the Range Extender (RE) battery first method and then only use a small percentage of the Main Battery to complete the ride. Come home and recharge the RE and leave the Main battery at 90 or 93 or XX. Only charging the RE and then only after 5 or 10 rides recharge the Main battery. But does trying such a strategy have the ability to drive me nuts????
I just want to ride my bike and not deal with these issues.