Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: how long does the battery last?
Document: I've had several of these DVRs over the last 20 years and they have been tremendously useful. I use them for short notes to myself, errands to do (record the thought whenI think of it, even driving, and transfer to a paper list later). I've used them for recording lectures, as many people do; I don't get around to listening again to these. Battery life has always been quite good, and this one seems to be just as good. The size is perfect.
Glad that I bought this little recorder. Super handy to have when you are out and about and have no place to write notes. Super long battery life and the microphone is really clear too. It's loud enough that I have to turn the volume down on playback because it sounds a lot louder to me that it did when I recorded the note. Multiple file folders too.
I bought this to use while I conducted several interviews. It wasn't as high tech as some of the other models, but I think it was definitely a bargain for the price I paid. I had no issue when it came to set it, it was very straight forward. I had plenty of space on the device for hours of recording. The battery life lasted a very long time, I haven't experienced a low battery yet.
Bought this for my wife's First Graders to practice their reading into. Kids love it,batteries last quite a while and I would reccomend it to others.
Good tape recorder. I am taking one star off because the voice recorder is made of plastic. I do not know how well it will last. There recorder is very flimsy.
Haven't been able to test out the battery life, but all the functions work properly. I enjoy the case it came with.
I really love this little recorder. The sound quality is fantastic and it does not use up the battery quickly. My only complaint is that I wish that it came with a power cord.
Works well. Inexpensive. Great battery life. Light weight and portable. It may just be my ear buds, but when they're all the way plugged in they only give one ear bud signal.
I bought this for work (therapist) and allow my patients to take it home to listen to the session. It's super easy to use, is gentle on battery life, and has a good amount of storage capacity.
Battery life lasts forever! I only wish there was the ability to connect it to the computer! Picks up the slightest noise without inter fence or static. Very clear playback and it is very easy to use!
Answer: ... 2 quality AAA's  lasts a a good month of daily use.