Aqara’s cord-free presence sensor runs for up to three years on battery power

The $50 sensor runs on two coin cell batteries so you don’t need a nearby power source for installation.
Cyclingnews

The Garmin Varia RCT715 is not only a brilliant rear light but an essential piece of my cycling kit – it's got $50 in this early Black Friday deal

In our Garmin Varia RCT715 review back in 2022, we awarded the RCT715 with a 3.5 out of 5-star review. Tester Josh Ross ...

I gave my 12-year-old Garmin’s new kids’ smartwatch – here’s what happened

I can’t say no to Garmin, so once the photoshoot was done, I handed the Bounce 2 over to my 12-year-old for testing. A few ...

I swapped my Garmin Fenix 8 Pro for the Suunto Vertical 2 — here’s 5 things I liked and 5 I disliked

I used the Suunto Vertical 2 in place of the Garmin Fenix 8 Pro for three weeks and it impressed on several counts, but ...
IEEE

Battery-Free Wireless Sensor Networks: A Comprehensive Survey

Abstract: Battery-free wireless sensor network (BF-WSN) (including energy harvesting network and energy rechargeable network) is a new network architecture that has been proposed in recent years to ...