I've opened the battery case up, and it contains 9 x 18650 lithium ion cells connected in series/parallel. Each parallel-connected set of cells is giving an open-circuit voltage of about 2.8v.
The cells are beyond use, as they're below the minimum safe voltage. So how best to dispose of them?
I'm considering either discharging them fully through a resistor to remove any remaining energy, or wraping them with tape to prevent accidental short circuit; then tossing them.
I guess they should go in the black-sack rubbish, as I don't think they're recyclable. There's a battery recycling bin in my local supermarket, but suspect that a bunch of LiIon cells would confuse the hell out of whoever sorts through these.
Any thoughts? Am I over thinking this?