Huawei Watch GT 5 vs OnePlus Watch 3

“Unfortunately none of the werOS watches offer a reasonable battery life. The least bad is the 46mm variant of the oneplus watch 3, as it offers to boot into an OS more suited a smart watch, while not an strictly need of fancy WearOS features (the model 2 does offer dual boot as well as do the 43mm variant watch 3 with a lesse bettery)”

“GT5 runs huawei own OS and no access to any google services - so not an option per what you are looking for. In terms of wear os watches you longest battery life is: technically the ticwatch atlas / enduro - standard is up to 5 days, but then extensive use of lcd screen and turning off features (essential modes) can extend it out further - but not a fan of their support or their durability (been issues with both). Then next best is OnePlus Watch 2 (up to 4 days) or Watch 3 (up to 5 days) - however can extend out to up 16 days by switching into their own os - however this takes away all the google services (incl nfc pay) - however only takes about 1 min to reboot back into wear os. Mixed use will generally give you between 5-12 days. Samsung GW Ultra - up to 3 days. For the rest you are looking at 1-2 days depending on model and size of model. Alt: no google services, but do offer their own payment system: Garmin with Garmin Pay; and Amazfit with Zepp Pay (note this is pretty restricted depending on country). For GT5 note that it looks like Huawei may be doing a deal with Curve which then may give them a payment option in some European countries.”