So if you're going to be using this pen every day or every other day, go ahead. Despite what Dell may say, this device stays on all the time. The battery lasts less than a week. maybe mine is broken? I had to buy rechargeable AAAA batteries to save more on replacement than I spent on a pen. Aside from constantly draining the battery, the device does what it's supposed to. But for me, who uses it every now and then, it's pretty much useless. Again, unless you use it every day. save your money