My Casio battery door is broken how do I replace it

You need two SR1120 or type 391s.

Good Morning Fhaas153

Looking at a J-10 picture on eBay
http://www.ebay.com/itm/VINTAGE-CASIO-J-10-ELECTRONIC-CALCULATOR-8-DIGIT-TESTED-/331587643662 , the picture of the rear says '1.5V battery x 2. Looking at this other shot
http://www.casio-calculator.com/Museum/Calculator/FGHIJ/J-10/Casio-J-10-back.jpg It looks like there is a fairly clear Slide-to-Open Battery door at the top of the rear panel. Given the battery rating at 1.5 Volts and the door size, I'd suspect it'll take either AA or AAA batteries. You should be able to slide the door and look, and most battery compartments will have an indication of the specific cell.

To be sure I'm covering both the what and the how, slide the door open. Remove old batteries if still there. Clean up contacts with a bit of fine steel wool if they are corroded or covered with old battery fuzz. Put new batteries in - negative end towards the coil springs generally. Replace sliding hatch.

Hoping this covers what you're looking for!
D

Turn calculator over. Look for some small screws. Loosen them, remove the cover. Notice how the two batteries look when they are in place (polarity) and replace them. Close the cover and tighten the screws again. You need two LR 44 batteries or equivalent.

Use electrical tape for holding the door or you need to visit service center for replacing the complete door.

don,t bother looking at this site as it gives no solution to any problems

Same problem here with broken battery cover door! Called Polaroid and NO they do not have these parts to replace....if the camera was under warranty Polaroid would have replaced the entire camera.....soooooo when you find out any info as to where to get the battery door list the info! Thanks! & good luck too!

Not sure about your mouse but ry Normal 0 If the mouse doesn't have a little door to open on the bottom, then try this. Just behind the Left and Right keys where your hand rests, apply firm pressure down on the cover and slide to the rear. Some mouse manufactures have used this type of access to replace the batteries.
Hope this helps. Bud

If you're handy, you can replace it in about 3 minutes. Don't attempt it unless you're willing to risk tearing a thin flexible circuit under the rear cover. Looking at the camera from the rear, remove the screws on the right hand side ( 2 ? ) then the screws across the bottom - open the card door, remove the card, and wedge a knife blade between the front and rear cover halves - the card door will be loose with an attached spring coming free. No need to remove the rear housing completely, just enough to expose the tracks for the battery cover hinge. Remove the old door, noting the position of the opening spring at the hinge, by angling one hinge out first. Insert the new battery cover and the card door in reverse order.

This is what I suggest: Get yourself a new backup battery. First backup your Casio. Then install the main battery. Plug the Casio in and recharge overnight. Once recharged, install the new backup battery. Make sure you do not touch the battery with your hands. Use a tissue. This should solve your problem if the Casio is not physically damaged.