Change Battery Polar F11 Heart Rate Monitor

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.

Yes you will get some bass roll off in the very very low end, so it will not go down to 5 hz like a set of 800.00 aphex 124a or 750.00 Arx distribution split. The 20 db of gain is a big plus, and of course having level control pots on all outputs, is an excellent feature. IF you are using to drive multiple low end subwoofers, you may wish to change the output capacitors. Existing ones are 10 uf 50 volt polar electrolytic, and you can easily change for 100 uf 50 volt polar electrolytic for a few dollars. Once you open the case these can easily be seen. The capacitors are easily available and are not expensive. If you try this you will need a solder sucker. Do not try soldering without one. Suck up all the old solder and remove the caps and replace all of then in the existing threw holes. They are marked for positive and negative on the pc board. Once you got them all in place just solder them back in. Once you do this for a few more dollars you can rival any expensive distribution amp. Would be nice if it was more than just 3 inch deep on the case. Most components are at least 6 inches.

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 being able to change the battery and keep the finding going....