Earlier quoted context omitted.
Tesla's previous CTO and Co-founder, JB Straubel (who spent 15 years at Tesla), left to found Redwood Materials [1] (which intends to scale up battery recycling processes). Fortum, a Finnish clean energy firm (correction provided by @Sharlin), has reached an 80% recycling rate as of 2019 [2]. It's always going to be cheaper to pour end of life cells into a remanufacturing process than to extract raw lithium from brin…
>> Batteries are mostly recyclable currently, full stop SOME lithium batteries are recyclable, but ALL oldschool lead acid batteries are recyclable. For installations where weight/size are secondary concerns, old fashioned wet car batteries are more "green" than anything involving lithium. A used lead-acid battery is not a liability. It is a useful and profitable product that can be easily turned into other useful pr…
I interpreted the original quote "Batteries are mostly recyclable currently, full stop" to mean "all batteries are mostly (i.e., >=80%) recyclable" i.e., even lith-ion batteries are ~80% recyclable and 80% constitutes "mostly". The original quote is confusing, and I think you might be interpreting it as "most batteries are recyclable" or perhaps "most lith-ion batteries are recyclable". In whatever case, I wanted to jump in and clarify.