I have a droid and I hate that annoying low battery sound. Especially since it doesn't sound pleasant and makes me want to puke. It startles me no matter what. And it even woke me up early this morning. But I do have a solution to this garbage; just turn the sound off (or put it on vibrate) when your battery reaches 20%. The only problem is that sometimes I forget to turn it back on after turning it off to avoid hearing that unpleasant noise (or even sitting in class, church service, or other places that request people to silence their phones) and end up getting missed calls.