A comparison between the two models of the OnePlus Watch 3 reveals a tradeoff between battery life and design. While the larger 47mm version offers up to 100 hours of battery life, the smaller 43mm model falls short with around 72 hours. Despite featuring a 1.32-inch AMOLED display and a hybrid software approach, the smaller size comes with a smaller 345mAh battery, impacting its endurance.

Leaked renders of the OnePlus Watch 3 43mm variant. | Images credit — Android Headlines
It remains to be seen how this difference in battery life will affect user preferences when choosing between the two models. The upcoming July 8 event from OnePlus is expected to bring more clarity on the specifications of the Watch 3 lineup, allowing consumers to make informed decisions based on their priorities.