I'll just leave this here
These are my flying buddies. And what we do with old batts that no longer perform.
Lipo batteries can be awesome, but they are NOT care free.
Don't over charge
Don't over discharge
Don't charge over charge rating (1c rating is safe)
Use proper type of charger
I'm thinking that even a charging system on the ski will cause a fire.
Besides that, they have been the greatest invention for all my RC stuff