cms 50-D Plus Vs. 50-E

I ordered the CMS 50-D Plus, but they sent me the 50-E, so I called and was told they were out of the 50-D Plus, so they "upgraded" me to the 50-E, which is a "better" item.

What are your thoughts on this?

I'm worried about the rechargeable battery.
I also want to be sure I can put my data on the computer and see the results there.

What's to worry about? The internal lithium rechargeable battery is good for at least 12 hours and it charges through the USB cable when connected to your computer. You got a smaller, lighter weight, fancier (better?) pulse oximeter for the price of the 50D.

Be happy.

Well they are the same price at the company I bought it from, so I just wasn't sure. I've decided to keep it after reading over everything. I think I read somewhere that once the battery dies completely you have to send the entire unit off. That's what I was worried about. It feels really nice and the inside where your finger goes is soft and "cushy"

krl0309 wrote:Well they are the same price at the company I bought it from, so I just wasn't sure. I've decided to keep it after reading over everything. I think I read somewhere that once the battery dies completely you have to send the entire unit off. That's what I was worried about. It feels really nice and the inside where your finger goes is soft and "cushy"

Yes, I see the 50DPlus comes with the same software as the 50E. Rechargeable lithium batteries last a long time. Not like ni-cads. So I don't expect you'll have any problem for several years. And apparently these units are serviced in the USA. But by that time, there will be a better unit out that features a day planner, MP3 player, and maybe even video-conferencing capabilities. And it will likely be less expensive, too.

So like I say, be happy.

Don't let any rechargeable lithium battery device sit for a long time (months) without charging, especially if the battery is run down. Lithium batteries also have a tendency to simply up and die on you without any particular reason.

However, lithium batteries have their advantages as well, so you didn't get shafted or anything. They're great unless/until they quit working on you. Nickel Cadmium or Nickel Metal Hydride batteries have problems, too.

I'd personally prefer replaceable batteries given the choice.

Plan on replacing the lithium powered oximeter 3 or 4 years down the road, but they'll probably be better and cheaper by then. Heck, Microsoft will probably change something in Windows by then that makes all our CPAP software quit working by then anyway.