No one likes a mushy sandwich 🥪 It’s definitely a good investment for families that travel a lot or like to go to the beach or the lake!! my 12 V still works even with my car powered off, which is a huge convenience, but obviously you don’t wanna leave it plugged in for hours upon end so it doesn’t run your battery down, but I had mine plugged with my car, not running for probably three hours with no issue