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

Input:
Question: How many batteries does it take
Document: We have tried many different products which claim to be good for whipping milk into a froth for uses such as cappuccino. This is the best, by far. It will whip it up to almost quadruple the volume. The only shortcoming is that the mechanism (I think the bearings) fail after about three months use so you need to replace the item. The batteries last for about ten days in our case, making two cappuccinos per day.
I very much like the button on the side which makes for easy on and off although I wonder about why the button can be pressed at the button top or bottom with the same speed. The battery compartment is harder to open and close than the twist off Primo Latte, and I hope that I don't need to change the batteries very often. I've found that frothing skim milk is a breeze with this little tool and understand why it's the model I've seen in many stores.
The batteries didn't take much to figure out and the cleaning is a breeze. The machine is delicate and you just have to be careful not to scrape the twirler, which is why it comes with a stand. I'm buying this for this year's presents for my family! And, I'm taking one to the office for quick cappucino at my desk! Heaven made this gadget! Thank you.
I froth my half and half every morning for my fresh ground french roast coffee using this frother. It keeps doing the job and never lets me down. Replacing the batteries is a snap if you just take your time doing it. Convenient holder keeps the frother off the counter surface so the stem doesn't get bent. Easy to rinse right after each use. Great product.
It looks really nice but you have to be carful placing the batteries since it has a fragile housing, and the manner of placing it back together can brake it. It also broke after two weeks of use. I had to take it apart and fix the motor. It took me about two hours. It is now working better than ever, but I do not know for how long. The motor appears to have some kind of resistors which is part of the reason why it brakes so fast.
I received the item in good condition and took it out immediately to put batteries in it, etc.That night, I used it to make "special" hot cocoa for my kids, as they had been reluctant to drink milk.They both liked how the milk turned out.I don't use it every single day, but use it frequently enough to keep it onthe stand on my countertop. It is very small and compact, so it doesn't take up a ton of space.
The Bon Jour Primo Latte Frother with stand is simply excellent. We use it and have given many to friends who admired ours.
Came quickly, nicely priced, works great in many different liquids. I recommend this product. It's easy to clean, store, and it impress your friends!
We bought this same frother to replace one we used every day for many years. The frother worked for exactly one day before it stopped working! No thank you for a replacement...
I have to agree with many of the reviews here. I love how it froths. However, the battery compartment is pretty thin plastic and broke after a few uses. I've been holding it tight while I froth until I order a new one. If they just made the compartment stronger, it would be the best because it does the job. After 10 seconds you get a beautiful mountain of frothy milk.
Answer: 2-AA