• Yes. Mine gets through a battery a day, which I can push out to 4-5 days by taking the NDS crank off the bike and leaving it in the airing cupboard for a week or so. It's cheap, and it's easy to fit, but it's pretty easy to sellotape a slim matchbox to the side of your crank, and for most purposes that'll be about as functional as a Stages power meter. It'll be lighter too.

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