Instruct: Classify the given Amazon review into its appropriate rating category
Query: annoying as battery slides out other end.

Ok, so I use eneloop and these are just not as well designed. They work, but because you have the battery able to slide out the other side, it just makes it annoyingly hard to put it in some devices. I was trying it on the Disney Car's Mater, the large one. Based on how it fits in there, should be too hard. But every time I tried, the batter would slide out one side or the other. The eneloop sizers have a lock and cap, so the AA doesn't slide. I guess this still works in cases where you rarely change the batteries. In that case, it may be worth it to get annoyed once in a while but save a lot of money.