Finally, let's talk about battery life and this is one area that continues to impress me in Samsung's Galaxy Watch lineup. The battery unit on this watch will easily last you for one and a half days and even two days with the power save mode turned on... The biggest downside over here is the charging speed as it takes almost two and a half hours to top it fully, which is a bit weird for a watch that only packs in a 340mAh battery. The slight silver lining, however, is that if you happen to own the latest Samsung Flagship phone or any Qi-certified devices then you can wirelessly charge the smartwatch as well. Also, keep in mind this is the 45mm model with a bigger battery. If you buy the 41mm model, expect slightly shorter battery life.