Why is there 4 small magnets inside?

This just happened to me as well, opened the back to find them stuck all over the motherboard, No wonder it wouldn't turn on! after removal it required a battery charge then worked find after that.

turns out we had 2 of them so i opened the 2nd one and found the 4 magnets along the left side of the case. i think if you drop it maybe(maybe) it protects it from damage or something :)