Even with frequent use, it is able to maintain its charge for more than a week. The removal of the block containing the numbers was, in my view, the best option available; as a consequence, the size of the keyboard has been drastically reduced while the buttons have retained their original dimensions. When the buttons are pressed, they react appropriately. It is impossible for the eye to be affected by the backlight. The fact that there is a control panel that can be touched is really convenient. I haven't observed any drawbacks up to this point.