[Zigurd]

Small batteries are uneconomical to recycle, and most don't contain dangerous metals or other chemicals. Lead-acid batteries used for starter motors in cars are big, heavy, and contain lead, which you would pay to divert from landfills, even if recycling them isn't profitable on its own.

Lithium batteries from cars and large storage systems will be worth recycling when they are numerous enough. It's unclear if a phone battery will ever be worth recycling.