[RayChuang88]

I think it's really hard to have an objective review of the Apple Watch because it's a product so unlike everything else Apple has done. And it's only in the first stages of its development--as new generations of better batteries using dry-electrode lithium-ion technology arrive over the next few years, expect far longer battery life per charge--possibly three to four times what is now possible.

[Swordmaker]

I think it's really hard to have an objective review of the Apple Watch because it's a product so unlike everything else Apple has done. And it's only in the first stages of its development--as new generations of better batteries using dry-electrode lithium-ion technology arrive over the next few years, expect far longer battery life per charge--possibly three to four times what is now possible.

Keep in mind also that the batteries on the Apple Watch can be changes out for new tech batteries when they come out.