Hobby king put out a great article on storing lipo batteries, there are some steps needed to reduce / eliminate fire risk as well as making a sable condition for the batteries to reside
Read more at the Hobby king article
Lipo storage bags are a must even for charging, check out these options
The Zeee Lipo Safe Bag offers storage for a full day’s worth of batteries with a zipper and caring strap.
Ive used small “brick bags” for years for my multi rotors and aircraft, DerBlue sells them in a 2 pack
Gould Aero 