My battery life in the HRM is very short compared to other HRM's I have used. I only use the Wahooo Blue for about 40 mins a day.
1973958
If you store your iPhone out of the direct line-of-sight of the HR (like in a back jersey pocket), the signal strength has to be pretty high. Bluetooth frequencies are absorbed by the human body and the signal strength needs to be higher. So when the battery drains a bit, the signal strength drops and you lose the connection. In all likelihood, the HR is still working but the signal is not getting to the iPhone. If you hold your iPhone in front of you, you'll probably start getting HR readings again.Bottom line, don't store your iPhone in the back center jersey pocket. Back side pocket is a little better. But in direct line-of-sight of all the Bluetooth transmitters is best (cadence, HR, iPhone, RFLK). If you store your iPhone out of the direct line-of-sight of the HR (like in a back jersey pocket), the signal strength has to be pretty high. Bluetooth frequencies are absorbed by the human body and the signal strength needs to be higher. So when the battery drains a bit, the signal strength drops and you lose the connection. In all likelihood, the HR is still working but the signal is not getting to the iPhone. If you hold your iPhone in front of you, you'll probably start getting HR readings again.Bottom line, don't store your iPhone in the back center jersey pocket. Back side... » Read More If you store your iPhone out of the direct line-of-sight of the HR (like in a back jersey pocket), the signal strength has to be pretty high. Bluetooth frequencies are absorbed by the human body and the signal strength needs to be higher. So when the battery drains a bit, the signal strength drops and you lose the connection. In all likelihood, the HR is still working but the signal is not getting to the iPhone. If you hold your iPhone in front of you, you'll probably start getting HR readings again.Bottom line, don't store your iPhone in the back center jersey pocket. Back side pocket is a little better. But in direct line-of-sight of all the Bluetooth transmitters is best (cadence, HR, iPhone, RFLK). « Show Less
1973959
I have not had to replace the battery yet. I use it about 30-40 minutes 3-4 times per week. I have had it for about 7-8 to months. I have no complaint on that issue.
1973960
I have to replace my battery on average of once a month. The monitor gets used 90 minutes a day on average. This seems high to me. Not sure what other monitors performance is.
884693
Depends on your usage. If the heart rate monitor is left on the strap, it keep working/depleting the battery.
593908
Are you talking about battery life or the actual device? Battery life is ok, just ok. Once it says battery low, it will be dead in 5 minutes. As far as device quality, all Jabra devices have horrible lives. They just aren't built to last.
1798158
I've been testing mine out recently - I run for about 2hours, 2hours 15 mins. It usually lasts 2 such days - so 4- 4 1/2 hours- which is quite disappointing. I have a feeling indoor battery life maybe slightly better. I was looking for the "rated" battery like myself. Would be nicer if it went a week without charge.
784784
I purchased new batteries (2 as they were so inexpensive & I plan to keep my phone for a while) after owning my phone for about 16-18 months. The original battery was lasting only half a day. I use my phone primarily for checking e-mails & some calls, very little online time. The new battery lasts all day or close to it with my usage. I would guess - as another reviewer posted - that you might get 4 hours of internet use. Buy a couple & switch them out. BTW... batteries losing the ability to stay charged is normal for any rechargeable battery, not just the HTC or other smart phones. Another option is buying the double size battery. Just a thought. I purchased new batteries (2 as they were so inexpensive & I plan to keep my phone for a while) after owning my phone for about 16-18 months. The original battery was lasting only half a day. I use my phone primarily for checking e-mails & some calls, very little online time. The new battery lasts all day or close to it with my usage. I would guess - as another reviewer posted - that you might get 4 hours of internet use. Buy a couple & switch them out. BTW... batteries losing the ability to stay charged is normal for any rechargeable battery, not just the HTC or other smart phones. Another... » Read More I purchased new batteries (2 as they were so inexpensive & I plan to keep my phone for a while) after owning my phone for about 16-18 months. The original battery was lasting only half a day. I use my phone primarily for checking e-mails & some calls, very little online time. The new battery lasts all day or close to it with my usage. I would guess - as another reviewer posted - that you might get 4 hours of internet use. Buy a couple & switch them out. BTW... batteries losing the ability to stay charged is normal for any rechargeable battery, not just the HTC or other smart phones. Another option is buying the double size battery. Just a thought. « Show Less
16673
I can't really answer that because I didn't wear it often. I didn't find it to be that user friendly so I went back to using my Polar watch w/ heart rate monitor. You may want to ask other purchasers and/or do a customer review search to get a better cross section of opininos.
1595327
Thanks very much for your response. I'm only getting about an hour or less of battery life. I'm very disappointed. Thanks again.
523254
My experience was such that the heart rate monitor failed regardless of the fixes I tried to apply - shaving, changing the battery, wetting, deleting and re-installing the app (I used Adidas miCoach and MotionX-GPS and the failures were consistent on both). Jarv was great and gave me a full refund on both units I tried. I also had this problem with the Adidas miCoach HRM with the dongle. I'm wondering if this is a "me" thing or if it is endemic to monitors in this price point. I read plenty of reviews from people who say they work just fine for them.
371871
I just recently purchased this mouse, and so for I like it, but the battery life is not very good I play World of Warcraft a couple of hours a day, and I have to recharge this mouse every day or two. Logitech's explanation is that they sacrificed battery life for performance, since it is a gaming mouse. This makes some sense. We'll see how it goes over time.
143582
I don't have it on unless I working out. I used it for a week. Worked out an hour each day. Battery Was good for at least 5 hours of workout time. I'm sure it will last longer if it is on a standby time.
1831535
I've used it for both activities, and it was pretty accurate. However, the battery life sucks....It died 2 months ago (I bought it in May 2014). Changed the battery, and it still doesn't work. But I have a Smart Health HRM without a chest strap (wrist only) and it had the EXACT same readings as the Polar.
767903
This is hard to give a definite answer to. The louder the volume the shorter the battery life. Typically I get six to ten hours. The beauty part of this device is that the battery isn't built in. I personally ordered a couple extra batteries off of eBay for $3 each. This helps to keep the music going for when recharging isn't an option. Good luck. You'll love this unit. We do!!
529049
I only use mine at the gym while I'm on an elliptical or treadmill, so it's usually on less than an hour. I've never noticed a significant drain on the battery.
801073
I would say after 3 to 4 workouts. I have noticed that if I don't wear the HR Monitor it lasts a little longer.
156745
The first battery lasts more than a year on my Core Black, some recent battery lasts less than 6 months, so I found it's not easy to give a time for it. Some functions are less battery-efficient like the compass and the storm alarm, so I try not to use them if not necessary.
156692
I wear it all day long, since i wake up until i go to sleep. They're turned on all this time. I make a few calls every day..I listen to music when i for to train, or run..I also watch movies at night using it, to not disturb the others sleeping at home. With that kind of using, it goes from "battery full" in the morning, to "battery high" in the evening...I put it on charge every night, and so it lasts something like 20 minutes to get full again (blue lightning).I have not gone to a complete empty battery for now.I'm just very satisfy about this headphones, in everything. I wear it all day long, since i wake up until i go to sleep. They're turned on all this time. I make a few calls every day..I listen to music when i for to train, or run..I also watch movies at night using it, to not disturb the others sleeping at home. With that kind of using, it goes from "battery full" in the morning, to "battery high" in the evening...I put it on charge every night, and so it lasts something like 20 minutes to get full again (blue lightning).I have not gone to a complete empty battery for now.I'm just very satisfy about this... » Read More I wear it all day long, since i wake up until i go to sleep. They're turned on all this time. I make a few calls every day..I listen to music when i for to train, or run..I also watch movies at night using it, to not disturb the others sleeping at home. With that kind of using, it goes from "battery full" in the morning, to "battery high" in the evening...I put it on charge every night, and so it lasts something like 20 minutes to get full again (blue lightning).I have not gone to a complete empty battery for now.I'm just very satisfy about this headphones, in everything. « Show Less
156748
Low battery life. I guesstimate my Suunto Core lasts maybe 1 month or 2, only.