Polar Ignite. Design – Polar followed up its popular Polar A360 smartband, the Polar A370, the band is similar to Polar A360 when it comes to looks, it still has the 23.5 mm x 27 mm x 13.5 mm body with 80 x 160 TFT color LCD with vibrant glass display. Fitbit Charge 3. … That’s not bad compared to the day and a bit for the Apple Watch But 4 days is less than other bands. Battery life is relatively poor, though, and it’s bulkier than much of the competition. Polar Ignite. This new unit took the hardware of the Polar A360 that was released about 18 months ago and plopped in a few new features like continuous heart rate (the first Polar unit to offer such) and rebroadcasting over standard Bluetooth Smart HR protocols (also the first Polar unit to do so). Hence you will only get about 4 days. This new unit took the hardware of the Polar A360 that was released about 18 months ago and plopped in a few new features like continuous heart rate (the first Polar unit to offer such) and rebroadcasting over standard Bluetooth Smart HR protocols (also the first Polar unit to do so). 1. is dustproof and water-resistant. BATTERY LIFE. 2. sweat resistance. Water-resistant devices can resist the penetration of water, such as powerful water jets, but not being submerged into water. Polar A370. Polar A370. The other incredibly annoying feature is that the display goes black very quickly, presumably to save battery life. I am satisfied with 4 days battery for the A370. Polar A370. Water-resistant devices can resist the penetration of water, such as powerful water jets, but not being submerged into water. 1. is dustproof and water-resistant. Polar A370: Battery life. Make sure this fits by entering your model number. 2. sweat resistance. The Polar A370 looks almost exactly like the Polar A360, its predecessor. ; Continuous heart RATE - have the A370 intelligently Track your heart RATE through the twists and turns of everyday life Assisted GPS - Use your phone's GPS to Track speed, distance and route; get notifications for incoming calls, messages, social media and calendar appointments right on the screen of your Polar A370 Just over a week ago Polar announced their latest wearable – the Polar A370. The device is dustproof and water-resistant. The A370’s beautiful screen eats the battery juice. Polar A370. Even better, it only takes about 15 to 20 minutes of charging to get another week of battery life. The battery life is also poor - although Polar's blurb says it lasts up to four days with 1 workout a day, mine would barely get to 2 days with only 1 workout over the period. Fitbit Charge 3. Fitbit Charge 2 v Polar A370: Price. The battery operating time is up to 4 days with 24/7 activity tracking, continuous HR tracking on and 1h/day training without Smart Notifications on. Polar promises four days of battery, but like the A360 I've found that to be a bit conservative. Just over a week ago Polar announced their latest wearable – the Polar A370. On the price front, the Charge 2 … The device is dustproof and water-resistant.