I haven't used one before for storage or charging but after reading this thread below im going to buy one, until then I will charge & store them in my garage on bricks on concrete floor.

Read this and then make up your own mind, for $20 you could save yourself/house - it probably wont happen but as they guy above said if it does & all you wanted to do was save 20 bucks then you will feel dumb.

Another option is to charge the lipos in a cinder block, cost you nothing if you can find one somewhere, its just annoying & bulky to move.

* attention lipo users* liposack saves my home