buy this to replace a illuminate wire keyboard I have for use with my htpc . love this keyboard . the instant on when it sens my hand be close to the board be a really nice feature . there have be time where the light will stay on , even though my hand be not near it , but that have be few and far between . Have have this for over a month now and have only charge it one time with a average daily use of about a hour\/hour and a half total per day . waf = 10 out of 10 .