Garmin vívoactive 3. The Garmin vívoactive 3 comes with several pre-loaded sports apps so that you can keep track of your workout and fitness whether you're running, swimming, doing yoga or another activity.

Built-in GPS records your location, distance and pace for each activity. The battery lasts up to 13 hours when using GPS, and up to seven days when used as a traditional smartwatch. After a workout, the information is automatically uploaded to Garmin Connect.

PediSoft Electric Callus Remover is powered by Nickel-Cadmium Rechargeable Batteries. The battery lasts up to 40 minutes. You'll save money by not having to buy replacement batteries.

The roller is made with micro-abrasive particles to make it very effective at removing your rough skin and calluses. It has a simple design with a one button operation.

Smartwatches may be accurate but they'll likely be obsolete within a couple of years. If you're looking for an ultra accurate watch for the long haul without having to recharge each night, Morgenwerk Satellite Precision made of surgical stainless steel / titanium and all equipped with passive GPS antennae that receive the time and timezone from GPS satellites equipped with Rubidium-based atomic clocks.

This means that you'll never have to set the time manually but can rather set it with the push of a button. It's also got a lithium-ion battery that lasts up to eight months per charge.