I be a bit leery buying this keyboard because I be not sure how often I would have to charge it . I figure if I be plug the thing in for a full day to charge every 5 day , it would defeat the purpose of have a wireless device . much to my delight , I have own the keyboard for three month , use it 5 day a week for work , and I have charge it only once -lrb- and even then I suspect it be because the device do not have a full charge out of the box -rrb- . grant I usually turn the illumination off because I simply do not need it , but there have be several occasion where I have forget to switch the keyboard off at night and the battery meter remain full . I would strongly recommend this product to anyone look for a wireless keyboard . the illumination be a bonus for I , but if you need that it too work great . I be a huge fan of Logitech and they unifying platform . I use this keyboard in conjunction with a m510 mouse on the same receiver dongle and have have no problem .