CNET's key takeaways
When I tested the Blink Outdoor 4, it was one of the first battery-powered models I had tried from the Blink security brand and, after testing dozens of outdoor cameras from different brands, I wasn't sure what to expect. Yes, Blink makes lofty claims that its lithium AA batteries last a ridiculously long time, but I've heard marketing lingo like that before. This compact wireless cam, however, stayed posted on my fence through all four seasons and well beyond as I waited -- and waited and waited -- for those batteries to die.
While my Blink Outdoor 4 model didn't quite reach the full two years that Blink rates its wireless camera batteries at, a year and a half far surpasses any wireless camera with a rechargeable battery like Ring or Nest use. In my experience those rechargeable batteries last several months at the most before you need to bring them in for a recharge or switch them out with a new battery pack.
That recharging gets annoying during cold winters or for wireless cameras that are posted out of reach and require a ladder to switch batteries out. And if your cams activate all the time, batteries run out even faster. I don't mind leaning out to grab the video doorbell for a quick recharge, but for other outdoor cameras it turns into an unwanted -- and random -- task.
Blink, meanwhile, promises long-lasting batteries that you replace, not recharge, when the time comes. Those new batteries cost $4 to $5, which works out to about 22 cents a month for the convenience of not bothering about it. I've found that to be a particularly helpful option for an outdoor camera I can set up and leave to do its job -- giving me one less thing to worry about.
My experience with the Blink Outdoor 4
The Blink Outdoor 4 is fully wireless and very compact for an outdoor cam. CNET/Tyler Lacoma
I think of the Blink Outdoor 4 as a "jack of all trades" outdoor camera, which is why it has earned a spot on my best picks for home security cameras as best camera for battery life. I often find myself recommending it for someone who wants an all-purpose camera at a fairly affordable price of $100.
From the 1080p resolution and Alexa support to the two-way audio and motion detection, the Outdoor 4 does a little of everything in a compact, weather-resistant design. But where it really shines is that extended battery life.
Battery options that keep lasting
The Blink Outdoor 4 runs on two lithium AA batteries slotted into the back (included). Unscrew the back cover and you can have new batteries in and out in a minute -- I just did this part after a year and a half of use and the hardest part was remembering how to detach the Outdoor 4 from its mount without breaking it.
Unlike some batteries with "lithium" in the name these aren't rechargeable. They offer other benefits instead, including extra power compared to traditional AA batteries and an elongated shelf life of up to 25 years, so you can buy a pack without worrying about them dying out. While more expensive than standard AAs, it's still low-cost: I can find a pack of 24 lithium AAs for $46, which works out to about $2 per battery or $4 to replace the Blink's batteries every year or two -- not a bad price for convenience.
If one to two years of battery life just isn't enough, you can also purchase a Blink extension pack ($30) to add more batteries so the cam can last even longer, a possibility if you want to put it in an out-of-the-way spot.
The Blink Outdoor 4 uses long-term lithium batteries. CNET/Tyler Lacoma
Mounting and placement
The Blink Outdoor 4 uses a small screw-in mount. I can't screw anything into my impervious fiber cement siding but a fence post proved the ideal option for watching my backyard and various wildlife appearances.
The mount is a little stiff and requires careful adjustment when angling but is otherwise problem-free. With an operating temperature range of -4 to 113 degrees Fahrenheit, I watched my Blink Outdoor 4 brave blistering summers and winter snowstorms without complaint, the batteries inside still powering through.
The Blink Outdoor 4 has an adjustable mount that's sturdy enough to stay at the right angle. CNET/Tyler Lacoma
A no-nonsense app to monitor battery life
I've tinkered with dozens of home security apps and Blink remains one of my favorites. The Blink app is a welcome combination of simplicity and easily accessible camera features. A few taps can get you almost anywhere you need to go, including quick camera live views and two-way audio chats.
The app also lets you check on battery life so you can see when it's "OK" or reaching danger levels -- until, as I found out, it dies completely, in which case you won't be able to check on battery life.
Blink's app also serves up motion and human detection alerts according to your settings. It also enables the connection to the included Sync Module 2, which has a USB slot you can use for video clip storage, making the Blink subscription services ($3 per month) entirely optional.
Blink's app is refreshingly direct and easy to use. Tyler Lacoma/CNET
Blink's solar option
I can't talk about battery life without mentioning solar panels. Many are available for the Blink Outdoor 4 and if you have the space you could add one. Some work better than others and the best like this $43 model have their own built-in battery to power the Blink because those lithium AA batteries can't be recharged.
With extra-long battery life, a solar panel is less necessary, but this is an option if you are putting your Blink camera in a sunny spot and never really want to worry about battery life at all. I haven't tested solar panels with the Blink Outdoor 4 but I have tested them with many other security cams and I can say they do keep batteries topped off, particularly in the summer months.
The specs for the Blink Outdoor 4
Size: 2.76 in W x 2.76 in L x 1.61 in D (70 mm W x 70 mm L x 41 mm D)
Weight: 5.0 oz (141 g)
Main Battery: 2 AA 1.5V lithium non-rechargeable batteries
Optional: Weather Resistant Power Adapter (sold separately)
Optional: Outdoor 4 Battery Extension Pack (available in the US and Canada)
Battery life: Up to 2 years with default settings. Customized settings, use and environmental conditions may affect battery performance
Field of view: 143° diagonal
Resolution: 1080p HD video
Images: View captured images in 640 x 360
FPS: Up to 30 fps
Connectivity: High-speed internet connection (such as broadband, fiber or DSL), Wi-Fi network: 2.4 GHz 802.11b/g/n
Hub support: Camera compatible with all Blink Sync Modules
2-way audio
Lights: 1 blue LED to help you know when it's active (optional). 1 red LED when recording in night vision
Operating temperature: -4 to 113°F (-20°C to 45°C)
CNET's buying advice
Blink's Outdoor 4 camera combines ease of use and battery life, two things that really make a difference. Tyler Lacoma/CNET
If you find recharging batteries every few months annoying, Blink's lithium AA batteries really do provide that extra convenience. For me, it's well worth the extra $4 to replace them every year or two.
Those long-lasting batteries also make it easier to choose a spot that's harder to access but ideal for a vantage point, like above a garage door, because you know you won't have to make frequent trips up there for recharging.
Cap it off with a user-friendly app and quite reasonable $100 price compared to outdoor cameras like the Ring Spotlight for more than $200, and it goes on sale during Amazon events like Black Friday and Prime day for as much as 50% off. The Blink Outdoor 4 should certainly be on your list if you're looking for a wireless camera.
If you want an outdoor camera with more bells and whistles and smart features plus voice assistants beyond Alexa, I recommend the Arlo Pro 5S. You'll have to recharge its battery more often and the camera really needs a subscription fee to shine but it can do nearly anything and includes Arlo's advanced AI customization options.