Australian Review: Apple Watch – One Month In
Prior to the Apple Watch's release, there was much speculation in regards to its battery. Many, including myself, were worried if it would make it through the day. Thankfully, it comfortably does; for the most part, I've ended each day with somewhere between 20% and 50% of charge left. Depending on your usage, you might be able to get two full days, but I've never had quite enough battery left to not recharge overnight.
If you're going away for even one night, you'll need to remember to also pack the Apple Watch's charger – it's not a deal breaker, but it can be frustrating if you forget.