You managed to create lithium batteries lasting for 100 years (meaning an iPhone user can scroll for a long time until the individual dies of old age without stressing if the phone will run out of battery). To put it into perspective: Nuclear Submarines can go on without refuelling for at least 50 years, so if you double that lifespan on a lithium battery: how would it shape modern electronics? What would it be like having a battery that can last an entire century?
That would mean iPhone & Android users don’t have to recharge every 10 hours or so (becomes every 876000 hours) meaning let’s say you bought an iPhone whilst in school it’s a full bar, by the time you are at old age living your golden years (it hits 5%) and throughout your entire life you forgotten that phones need to be recharged due to having a device that can last basically forever due to the battery being that powerful & having a long lifespan.
I think unfortunately this would open the door for bad actors too. Taking old outdated phone batteries and combining them would allow for some crazy things that could do mass harm. Even smoke detectors with Americium can be gathered and dissected to radiate a small neighborhood or inact terrorism. Additional reading: https://en.wikipedia.org/wiki/David_Hahn
The whole story of why we use Americium in detectors is an interesting one in itself. https://youtu.be/DuAeaIcAXtg one of my favorite long form nerdy youtube channels.