Polar M400 Heart Rate Monitor Battery Type

This watch has some many useful function including calling for help if you fall, heart rate monitor and other health app. I feel like Dick Tracy when I speak into my watch using the intercom or answering a phone call.

Great that he can monitor his heart for afib and take an EKG whenever he wants.

This is the third Apple watch I've owned. It seems that this watch works a little faster than the others. I use it as much for health issues. The Heart Rate monitor picks up the same as my belt. This is an improvement over the past watches. The Blood O2 is good, particularly now with Covid as lung function is an indication of the virus. All in all it's a worthwhile purchase.

This watch is absolutely perfect for my husband and I. We aren't sports fanatics but need to keep track of heart rate. We walk, ride bicycle, and treadmill. This watch tracks it all. Best of all, we only have to charge once every 3-4 weeks. Just wish I could get another one in the white rock color.

At first I used my SD card in store to try much more expensive Canon VIXIA HF G10 (around $1400) and I really liked its quality but didn't like the price. So, after some research I found that M400 as well as M40/M41 all share the same sensor etc. I selected M400 because it has no internal memory. It is much easier to insert my own SD card (even class 4 works fine) and then use it in my PC rather than use cable or copy from internal memory to SD card which in turn insert into PC. I was not able to compare VIXIA HF G10 and M400 in the same environment and same settings but generally my impression is that difference is not worth 1000 dollars unless you are professional. Yes, G10 video is sharper, but colors are the same, stabilization is the same and M400 can produce practically pro looking videos. Very good result considering its price. Also, I compared it with several other camcorders in price category below $1000. Some camcorders (like Samsung) produce amazingly sharp pictures, colors are rich, everything is perfect... except image stabilization! M400 stabilization is the best among all camcorders I tried. So, I proclaim M400 the winner $-)Low light perfomance is excellent, buy it for indoor use. Touch screen is not very sensitive, screen itself is rather too small - but the end result is very, very good for such price.Included battery is too small but it is possble to buy up to 6 hours from internet for around $20. However, 6 hour battery I bought through @ is not communicating with M400 i.e. every time I switch camcorder ON I have to confirm that I want to use this battery and time left is unavailable. Still happy because I paid just $20 including shipping. However, you may want to pay more for better quality of life. By the way, 6 hour battery visibly sticks out but improves grip a lot because thumb gets support. I hope my review was helpful :-)

Great rechargeable battery! Can't really rate it yet. It is my backup battery. I will know more when I need to use it!

I love this monitor. It was easy to set up and the instructions were prefect. I'd buy another one in a heart beat!

i use this as a second monitor and couldnt be happier. tHIS MONITOR PERFORMS JUST AS YOU WOULD EXPECT IT TO. THE REFRESH RATE IS INSANCE AS WELL. VERY GOOD PRICE

Amazing monitor! Refresh rate and clarity is incredible

I love this camera with all my heart.