How to open the back to replace battery? Tried very small screwdriver but could not get it in the crack.

Hi. The batteries will last 3 to 5 years depending on how much you use the Indiglo night light. If a battery only lasted 6 months then either the battery was duff, the indiglo night light was used an awful lot or the watch had been in the vendors stock for a few years without the energy guard in place.

should i buy this as i hear from other peoples comments it is extremeley loud this is for my school boy.

I would definitely buy the watch, it would make one heck of a nice Christmas or birthday gift.I certainly do not find the quartz movement that noisy, it can be heard if one listens very carefully, but its certainly not noisy.Its very well made, keeps surprisingly accurate time,losing around two seconds a week, and for the price, is magnificent value.I have found Timex, a superb company to deal with, if you need to contact their customer service dept.Your son, will be chuffed to bits if he received this watch as a gift.Its got a clear face, and the nylon strap will fit any persons wrist, even your sons.I am convinced that if you bought one, you would be wanting to keep it for yourself.A lovely watch, and superb value as well, BUY ONE NOW