HabitCharge with the coffee
The daily-charge watches (Ultra 2 and Pixel Watch 3) worked best when testers topped up during breakfast and a shower. Twenty to thirty minutes usually covered the day, and the watch was back on for sleep tracking.
Battery · charge cycles
Race Day to Recharge Day
A flat watch at kilometre 30 of a marathon is a lesson you only need once. Here's how long each watch really lasted in our training, and how to plan charging around your week.
GPS Hours in Standard Mode
Manufacturer-rated continuous GPS recording, in hours, rounded. Multi-band mode and music reduce these.
Our longest single session was a 9-hour mountain day. Only the Pace 3, Vantage V3 and Forerunner 265 finished it with more than a third of their battery left.
Habit24days, Pace 3
Rated typical daily use. We charged twice a month.
13days, Forerunner 265
About a week with five GPS runs and AMOLED always-on off.
8days, Vantage V3
Rated with continuous heart rate tracking on.
1day, Pixel Watch 3
About 24 hours with always-on display.
Two kinds of battery people
Smartwatch owners tend to fall into one of two camps. Daily chargers treat the watch like a phone: it goes on a charger at a fixed moment every day, and they never think about it again. Weekly chargers want to forget the cable exists until a low-battery warning appears. Neither is wrong, but choosing a watch that fights your habit is the fastest route to a drawer full of unused gadgets.
If you already charge your phone and earbuds on the kitchen counter every morning, the Apple Watch Ultra 2 or Pixel Watch 3 will slot in easily, and you get the richest apps in return. If you travel, hike or simply forget, the Coros Pace 3 and Forerunner 265 are the safe choices.
What drains a watch fastest
- Multi-band GPS: the most accurate setting, and the hungriest. Use it for races and city runs, not for every recovery jog.
- Always-on display: lovely on AMOLED screens, but it can roughly halve daily battery.
- Music streaming: playing offline playlists to Bluetooth earbuds is a heavy load.
- Blood oxygen at night: continuous sleep SpO2 readings cost noticeable battery on Garmin and Polar.
- Maps: scrolling detailed maps lights the screen and the processor at once.
Race-day battery plan
- Charge to full the night before, not the morning of. Some watches run warm and slow right after charging.
- Switch on multi-band only for the race itself, and turn music off unless you need it.
- For an ultra or Ironman, check your watch's long-distance or endurance GPS mode and test it on a training day first.
- Pack the cable in your drop bag or race-day kit if the event is longer than your watch's rated GPS hours.
Looking after the battery long-term
Lithium-ion batteries age with heat and with full-to-empty cycles. Keep your watch out of a hot car, avoid letting it sit at zero for days, and don't worry about topping up from 60% to 100%: little and often is perfectly fine. After two or three years of daily use, expect noticeably shorter battery life on any model.
See how battery ties into syncing and phone notifications, or go back to the five watches.