My Charge HR lasts 4-5 days between charges. I assume the charger is proprietary because the watch is water resistant, so I'm ok with that. I keep the cable at

My Charge HR lasts 4-5 days between charges. I assume the charger is proprietary because the watch is water resistant, so I'm ok with that. I keep the cable at work, and set a vibrate alarm to remind me to plug it in Friday afternoons. If you do need a spare charger, they're $5-$10 on Amazon. Cheaper than your Casio watch I bet ;) Looking fwd to the Pebble2 though. IMO all smartwatches should be eInk and hackable.