The Mag-Tac LED Rechargeable and Mag-Tac LED CR123 share trademark Maglite features. But their respective batteries and LED elements offer different advantages.

The August Wi-Fi Smart Lock runs on two CR123 batteries. Chris Monroe/CNET. Wi-Fi isn't easy on batteries, and this is the first August model with the CR123 battery.

CR123 batteries are more expensive than AAs; on Amazon, a 12-pack of Energizer CR123 batteries is $26 (about $2.20 per battery), while a 24-pack of Energizer AA Lithium batteries is $25 (about $1. ...

Just make sure you keep CR123 lithium batteries handy, as battery life will vary a lot based on usage and proximity to the included Netgear Arlo hub. Still, I recommend Arlo to anyone in need of ...

August is known as one of the original purveyors of auto-lock and -unlock abilities, though it's finicky with Android devices. On the WiFi Smart Lock, it’s supposed to perform the deed within ...

The Cortex, for example, provides 125 lumens of output when charged with the CR123 battery. That kind of light is enough so if you are under attack you can momentarily blind an aggressor's night ...

lumens and 22,541 candela. With a longer 300-meter beam from two included CR123 batteries, the LGL-160 provides powerful downrange light for two hours.