One of my local garbage companies recently converted it’s curbside fleet to CNG. Much quitter than diesel, has the required range and no toxic battery pack to dispose of at the trucks EOL. Also the mechanics do not need tons of additional training as it is a just a dieel,engine converted to,run on CNG.
Lithium ion batteries are not toxic, contrary to all the speculation that you may see in the comments section. Lead-acid batteries are far more toxic and we handle them just fine. (Just google lithium battery toxicity and read any of the results.)
Besides, the batteries are way too valuable to not reuse or recycle in some way. There is a market for second-hand automotive batteries out there for use as home backup electricity storage for people with solar panels. Tesla also has a recycling system set up for its batteries and Toyota recycles 100% of the components in their Prius batteries.