• The always on display and GPS via phone shouldn't use any noticeable power, but:

    • Definitely ensure 'wake on twist' is off
    • If you can make do with HRM every 10 minutes that'll help too
    • Be careful about your choice of clock face. If it shows seconds it'll kill your battery. Some faces are better than others too (although it's very hard for us to test/quantify each one I'm afraid)
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