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All you need to do is slide the battery cover to the Open position, then open the battery cover to access the batteries. If it doesn't open easily you may have some corrosion on the batteries holding the cover closed.
The most Irulu tablets have 2 small cover screws on each side, pop the cover unscrew it and open with careful. the battery is connected inside its a square white plastic cover connected to the motherboard . Hope this help.
I assume you mean that the entry keypad works when the door is open but not when the door is closed. This usually indicates that the signal strength on the entry pad is low. Try changing the battery.
Insert a small Philips screwdriver in the opening on the bottom of the battery compartment cover. Pull the cover slightly outwards then pull the cover down. The battery in the compartment is a 9V battery. Then replace the cover by inserting the lip in the top of the battery compartment and then snap it into place.
If you change the battery quickly, you shouldn't need to reprogram the opener. If a new battery doesn't solve the problem, check what may be causing signal interference when the door is down. (Consider moving the keypad to a spot closer to the door opening. I know that we have the keypads placed on the side of the door jamb on our garage doors. When the small handheld remote units start to loose their batteries, bringing the remotes to that area that often works.)
Locksmith advice on how to install sentry safe batteries slide open the battery cover located just below the keypad. Insert a paper clip or pen point into the small hole in the cover. Push in while sliding cover to the right. Disconnect and remove the battery holder. Insert the 4-batteries as indicated. reconnect the connector and put back the battery holder. Slide the cover back in place.
How do I insert the batteries on my advanced electronic lock safe? On the newer model Fireproof Sentry Safes my locksmith recommended me To install batteries,
turn the electronic lock case to the right and remove. Insert four new batteries as indicated, replace the electronic lock case and turn to the left to reassemble.
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
Hope this helps. Bud