Usually a LiIon battery pack loses very little power after a full charge... "lithium batteries suffer the least amount of self-discharge (around 2–3% discharge per month)" ... but I've got a LiIon battery pack that came with a Chinese bike light that goes dead after 1 week of being idle after a full charge, so they aren't even LiIon, are worse than NiCad or NiMH for self discharge, so who knows what chemistry is inside.
Could be a poor quality or faulty protection circuit. Even nicd wont discharge that quick
you'd expect some heat with faulty circuitry
"Self-discharge increases with
age, cycling and elevated temperature. Discard a battery if the self-discharge reaches 30 percent in 24 hours. "
those batteries must be old recycled ones then
(what chemistry? dead chemistry
)
there seems to be 2 definitions for LiIon battery recycling
1. Prior to the smelting process, plastics are separated from the metal components. The metals are then recycled via a High-Temperature Metal Reclamation (HTMR) process during which all of the high temperature metals contained within the battery feedstock (i.e. nickel, iron, manganese, and chromium) report to the molten-metal bath within the furnace, amalgamate, then solidify during the casting operation. The low-melt metals (i.e. zinc and cadmium) separate during the melting, The metals and plastic are then returned to be reused in new products. These batteries are 100% recycled.
2. Sell the depleted cells to someone else