The oldest ratings are outdated. An update came out in 2014 that increased battery life and also provided a new brighter display option for outdoor use, although a brighter offset reduces battery life. , naturally. It also has a pedometer feature which I haven't mentioned anywhere although I haven't used the feature yet. The formula it uses to measure calories burned seems way over the top compared to other devices I've used. In terms of function, I found the following: the battery life is 6.5 hours with normal brightness, 3-3.5 hours with high display brightness. I was easily able to get 11 hours of on-demand mode, where you have to press a button for the display to work, but I didn't fully drain the battery. The battery life given by the manufacturers seems to be correct. My device charges in about an hour, which is a lot less than what others have reported. I don't use the charger that came with it. I always keep a micro USB cable (for the phone) on my desk and it connects to the connector box that came with my tablet and seems to have a stronger charge than other USB cables. Maybe that's why my units recharge so quickly. The USB cable that comes with the device is quite short as others have noted. I compared the accuracy of this device to a chest strap worn at the same time. When both were working correctly, they gave very similar readings. While I initially found that the ePulse became less reliable as I started to sweat, the replacement unit sent to me may not have this issue. But I also changed where I save it. I have it on my biceps, where it's easy to see from my bike (my main exercise) and where the readings have been very reliable and consistent, even when high for me (170 or so). I'm not sure if it's due to less sweating, a stronger pulse higher up my arm, or a newer device, but it's been working like magic for the past few months. I can't tell what would have happened if I ran as hard as possible, although I suspect there wouldn't be as much strength in the biceps area as there is in the wrists, so it might work well. It seems impossible to read the units of measure set at the normal display level. when you're out in the sun, from every angle. If you set the brightness to maximum, you can see the numbers in the shade or at an angle, but this display also fades in direct sunlight. If I were to use it in bright sunlight without being able to shade the instrument with my other hand during practice, I don't think I could get a usable reading. But it's not difficult to shade (by tilting your face away from the sun) so can be used in the sun if you can tilt your forearm, although I've mostly used it indoors. I plan to take it on a hike and will report on the experience, although there is significant tree shade where I travel. My original device had problems and the company was very kind to send me a new one. Upon receipt I found that the power button on my original unit was defective as it now always turns on and off with one touch. There is a rubberized cover to protect the USB port when the device is not charging. The plug is attached to the device with a small rubber cord so you don't lose it when charging the device. My cable broke on the second attempt to charge the device. I can still use the power plug but if it ever accidentally falls out it will be lost. With the exception of this cable, the device appears to be reasonably well made. I like the fact that the device remembers the max and min heart rate, calories and time until you reset it. Some of the other heart rate monitors I've seen don't have memory, which is ridiculous. The device also flashes to let you know if you are in a specific heart rate zone or not. You also have the option to set your own heart rate zones. In general, I completely agree with the performance. And the specs for the price seem better than any other device I've seen. With the exchange of the block I award the 5th star.
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