The new Apple Watch Series 3 touts LTE-connectivity. Interestingly, it uses its screen as an antenna. The good news is that this did not negatively affect the watch's repairability. In fact, iFixit rates it at 6/10, same as the Series 2. Not much has changed on the inside. Obviously, there's the new Apple S3 chipset with a dual core processor and a few new chips which are probably the LTE modem and eSIM. There's a barometer now too, to more accurately track your exercise. Also interesting is the battery capacity - it packs 279mAh or 1.07Wh, a tiny increase over the Series 2 (which had...
Source: http://www.gsmarena.com/apple_watch_series_3_teardown-news-27438.php
