CASIO G-Shock Mini Battery Dead - Brand: CASIO - Model Name: G-Shock Mini GMN-691 - Color: Black Purchased new a few years ago for a child, but it was only used a few times and the battery has died. However, I cannot guarantee 100% functionality after a battery replacement, so please consider this before purchasing. ※ I've only used it 3 or 4 times, so the possibility of it being broken is very low.