The watch seems to have stopped. How do i open the back to change the battery.

I would take it to a jewelry shop or watch store.

Seems you are not alone encountering this fault. back to the service centre of into the bin I fear.

You won't know what battery it takes until you pop the back off and see what battery is in there. I've opened two identical watches and on the inside they had different movements that required two completely different size batteries. The trickiest part with Disney watches I've done is if it's musical, getting that to reset. Be careful, a lot of people don't realize how easy it is to mess up those tiny little parts, get dust in there, put the back back on wrong etc...

There are two batteries in the watch. One for the digital watch and the other for the analog watch. The battery for the analog side probably needs changing but when the back is opened, you might as well change both batteries.

Of course, there is the way to change the battery, but for this you have to visit your closest watch repair shop. I do mean WATCH REPAIRS, not the jewellers. Decent watchmaker will definitely open your watch and will replace the battery. Your watch's case appears to be a monoblock. That means you'll need to lift the crystal first, pull the stem second and just then you'll be able to extract watch's movement for replacing battery. Do not forget: jewellers and watchmakers are under one roof, but their trades are completely different. No jeweller can do watchmakers job and vice versa. Rate me, plz.

I contacted the manufacturer. You remove the crown, then use tiny attachment to a bike pump to push air into the interior of the watch. This will cause the crystal and dial to come apart. Viola!

Take it to your local jewelry store, they will sell you a battery and install it for you. Watch how they do it for the next time.

Probably you changed battery youself. If that's right, then open watch again, take battery out and check it with tester if it is fully charged. If yes- put battery back in place and secure the contact. Now carefully check for AC sign on movement. When found- take fine tweezers and connectAC with battery+ for 3 seconds.
Watch should work now, but resetting is needed. Use your watch manual to reset all watch functions.
NOTE: Some movements require connect AC and+ twice. This should be written inside caseback or on battery cover.

Good luck.

Arthur

good morning ! if your watch is waterfroop design that`s have a tread so if you want to open the case back you need a wrench or opener, but if your watch is snop in design you need a knife to open the case back,and change the battery,thank you,

some watches have a special way to open..nut by push/pull out the back but by rotating it .in this case it hase some small cuts in the back cover .if this so,it just might need to rotate.