WAAS or GLONASS? in GPS Posted December 19, 2014 YOU (several) HAVE GOT TO BE KIDDING !!!!! Totally unbelieveable! I've got several units with the same kind of latch. Batteries have been in and out thousands of times. I can take batts out and turn the units upside down and shake, rattle, and roll as hard and fast or as long as I want and card will never come out.....never!and with NO TAPE!! Now, these instructions are EXTREMLY difficult. Open the back of your unit. Take batteries out. Now this one is very important........Put your glasses on and / or get a magnifying glass. READ on the little stainless steel door covering the card slot. It's a four letter word.......LOCK.....and there is even an arrow ---->. When you put the card in, close the door then slide it in the direction of the arrow to LOCK. Card will NOT fall out PERIOD...EVER! .....even with no tape. To remove the card, first slide cover to unlock position, then open to remove card. Or you can just turn the unit upside down and shake and it will fall into your hand , or onto the ground or into the snow. If the door is loose in the lock position, it's because someone has forced it open without unlocking it first and distorted it. Re adjust it's shape and use it the way it's supposed to be used. Now, don't all of you raise your hands at the same time, but, How many of you didn't even know there was a "Lock" position that cures your exact "problem"?? Yeah, my tone may be a little condecending, but you have to realize that this is not a new "problem". How many models have exactly the same type card latch? It's NOT a latch problem, it's a USER problem. Some users can read, and some choose not to.