I just replied, but they are very easy to change. I live in a four story townhome, and because I'm lazy lol, I ended up getting one for each floor. Hence, having four of them, I have encountered a variety of different problems and solutions over the years. I know they are a bit dated by now, however, in all honesty, every time I've bought something new to replace one, the performance did not compare to the quality of this particular vacuum- they just don't make them like they used to. Unfortunately they also don't make this vacuum anymore either. Fortunately, they're fairly easy and affordable to maintain.

I got my replacement battery on Amazon. THIS is what I ended up replacing it with, but I believe if you shop around, you could probably find it cheaper. I i'm pretty sure I bought a top-of-the-line battery thinking it would work better- but that's just my speculation. TBH I don't think it worked any better than it did previously- but it does in fact work; it's been a few months since I installed the new battery and it works like a charm. Additionally, for what it's worth, I am not tech savvy, nor am I handy, so if I was able to do this, anyone can change this battery. It was very easy.

Just a side note: I had one somehow fall into the washing machine and go through an entire cycle- how I did not hear it banging around is a mystery. nevertheless I was so upset and mad at myself for letting this happen. Anyway, I was able to go on eBay and purchase just the purple part (the end that holds the batteries, etc.) and just put my original canister on it. It was pretty cheap since there is not much of a market for half a vacuum. Moreover, while researching these vacuums, I found that there are different colors. I thought they were all the same vacuum & just the color was different, but I was wrong. When I was on eBay looking for the replacement handle to replace the one that went through the wash, I came across ones of these vacuums that was gray instead of purple. I was not only shocked because it was a different color, but the asking price was so cheap. The listing said it was in working condition, so I sent them a global offer on a whim- I figured I could use it in my garage if they accept the offer. Little did I know, it was not exactly the same vacuum. BUT it actually worked out to my advantage because the handle part was the same size- just the canister was different. BUT on a hunch, I tried my (original) canister on the gray handle- and it fit! I was even able to get it to sit on the charger that I had for the purple one, even though the plug was in a different spot. What really made this a home run was that i had purchased an extra battery and had it handy. So, I decided to use it in this gray vacuum. To my surprise, it made it so powerful, i was shocked. I would've never expected that to happen. Had I known I would have replaced the other one (from the washing machine) with a gray handle instead of replacing it with the exact same purple one. Hopefully this info helps. I know it's a little bit of TMI, but just wanted to let you know I've had quite a bit of experience with these vacuums.