Donate them to the fire department and they can practice extinguishing lithium fires.About 200-300 of the 18650 size cells tested good in need of use and some 21700s. Need a deserving project before they get old...
And, if you charge it in your apartment, you can eventually have a campfire.Electric lawnmower? You can get a Neuton with a dead SLA battery for next to nothing and upgrade it with lithium. But what you have could be enough for an e-bike or trike. There's probably deals to be had on bikes/scooters with dead batteries.
by Jake Hertz
by Duane Benson
by Aaron Carman
by Duane Benson