I' have been using samsung's wireless keyboard and mouse for 2 yrs now, model noSDR5000K, initially it served well, but 6months down the line i faced some difficulty with it.. I noticed there was a lot of drainage on the batteries and, I use energizer lithium batteries, which are supposed to give extra life, but of no use.... then faced trouble with receiver, it wasn't responding well... hence, I have to change the batteries every 2-3weeks... I did get some info regarding this predicament, and some said that this is a common problem faced by these wireless keyboard's and mouse, some said try logitech, they are supposed to be the best.. and I don't even use the p.c very often for this can of drainage on batteries and mouse not responding well... help needed... thnks
Try a good set of rechargeable batteries. It is a moderate one time investment (~20 bucks or so), but other than that, you should be good to go for a long time.