These things are very delicate and can't take a hard fall. I dropped mine today on the cement and the whole inside of the batt moved so the button was wedged under the metal ring. This drop was from about 4 feet but landed flush on the bottom end were you twist for voltage. I know these thing aren't made to take a beating so just wanted to give everyone a heads up! Take care of your babies....lol
Oh well, may be I'll try the spinner for a back up