This watch needs constant recharging.  I bought it 16 months ago.  During the first 4 months i put up with the lousy charging thinking maybe is was due to winter.  But last May I tired of it and entered complaint.  Casio had me send it to their place for repair at my expense.  The repair time  took 4 weeks.  Upon receiving the repaired watch, the  battery/charging system was better but still would die every week or two.  Now, only a year later the watch won't hold a charge even for 1 day.  Casio says its out of warranty and I may have to pay up to $150 plus shipping to get it fixed.  They agreed that I should instead buy a Timex Iron Man which is what I will do as soon as I finish writing this review.