
Ice
Battery 40°C? Want to charge faster on a long trip? Try 1KG of ice over the high voltage disconnect, you certainly won't regret 1KG of over the high voltage disconnect.
In all seriousness this has worked for me dropping 4°C on the rear of the pack before the ice had melted.
I would not recommend this if you care about the car, this will give you soggy rear carpets and I now have surface rust around the hatch. If you don't care too much then go for it, it works.