HRM strap battery swap

Once again I spotted erratic heart rate data from the 935. On checking there wasn't any running dynamics data so the heart rate strap was offline.

I've just swapped the battery and according to the blog it's 3 years since I did it last. Can't complain then.

HRM-tri battery swap

On today's run a message popped up on my watch that the Heart Rate Monitor battery was low. It may well be linked to the cold weather but clearly it must be past its best. Luckily I keep a stock of CR2032 3V batteries in stock. There's a YouTube video of the process if, like me, you're not sure where the instructions are at home:

Note the the official instructions include a few extra tips.