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World-Class, Industry-Leading Technical Support - Forever Free

You’ll always have FREE access to our technical knowledgebase, application guides, YouTube tutorials & Customer Services, as well as all other online resources, help, white papers and articles.

If none of these answer your query you can also raise a ticket and get direct access to our team of smart home specialists for for assistance.


Access to technical specialists
100’s of in-depth help resources
Video guides via YouTube channel
Blog articles with product reviews & test results


The Vesternet Promise

As Founder & CEO of Vesternet, I personally guarantee your 100% satisfaction on any purchase.

I’d never want you to be unhappy with something you buy from us, so here’s my promise - you can return any unused products within 365 days. If you have problems with a new purchase, our support team will work with you to resolve. And if you still can’t get it working then you can return it within 14 days for replacement or refund. For full information take a look at our full returns policy.

In addition, here’s my personal email should you ever have any problems or feedback:

We’re not just a shop, we’re with you all the way on building your smart home.


Roost Smart Battery

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The Simplest and Most Affordable Way to Add Smarts to Your Smoke Alarm

The patented Roost Smart Battery uniquely combines a non-rechargeable lithium battery and advanced Wi-Fi in a familiar 9V package. Coupled with an intuitive smartphone app, the Roost Smart Battery solution delivers notifications to your smartphone when your smoke alarm activates, even if you are not at home. It also eliminates the annoying 3:00am chirping from your smoke alarms when the old battery is dying. In a typical smoke alarm, the Roost Smart Battery lasts more than 5 years, and even then you’ll receive a notification “before” the chirping ever begins.

With the same form factor as a conventional 9-volt battery, the Roost Smart Battery works with existing alarms to upgrade the safety and convenience of your home. Download the free Roost app and get alerts delivered to your smartphone if your alarm sounds, wherever you are. Invite friends and family to monitor your alarms for increased peace-of-mind.

This smart battery works with any 9V battery-enabled smoke or CO alarm and Wi-FI connection and no new alarms or expensive devices need to be purchased.



No More 3AM Chirps

Roost notifies you when alarm batteries run low. No more annoying 3AM chirps.

Be Notified

If your alarm sounds, you'll receive an immediate alert on your smartphone.

Alert Your Family

Roost sends emergency alerts automatically to friends and family. Be reassured your home is covered. Gives one-touch access to emergency contacts.

No More False Alarms

Is it just the toast burning again? One tap silences your smoke alarm. (Supports battery-powered alarms only)


The Roost App


Easy Installation

Installs in less than 5 minutes. No tools or professionals needed. No unsightly wires to untangle and no bulky hubs to hide.

Connect Your Alarms

Supports all Smoke and CO alarms in your home.

Alerts When You Need Them

App tells you when alarm sounds or batteries are low.



False Alarm? Snooze it

Burning the toast? Just silence your battery-powered smoke alarm with the app.

Set Up Your Monitors

Your friends and family can monitor your alarm in an emergency.

See Activity History

See the last time each alarm sounded or was tested.


Simple, Affordable Peace of Mind

Download Roost iOS or Android app to your smartphone, connect to your home Wi-Fi and change a 9V battery. No hubs, wires or hired contractors required. The innovative Roost Wi-Fi-enabled Smart Battery turns existing 9V smoke and CO alarms into connected smart devices in just minutes.

No expensive new devices needed. Retrofitting your current home smoke alarms by simply replacing the 9V battery with the Roost Smart Battery provides an affordable solution that improves your family’s comfort and safety. Receive emergency alerts even when you are away from home. And, no more smoke alarm “chirping” in the middle of the night with low battery alarms.

Taking care of your home and family is not expensive or complicated with Roost.

Technical Details

  • Model Number: 900-00001
  • Network Compatibility: Wi-Fi 802.11 (b/g/n)
  • Power Requirement: 9V; Lithium Primary Cell (replaceable, not rechargeable)
  • Regulatory Certifications: FCC, CE, UL (#MH61104), Wi-Fi Alliance, NRTL, RCM
  • Dimensions (H/W/L): 1.9” x 1” x 0.7” (48.3 x 26.3x 17.3mm)
  • What’s Included: Roost Smart Battery, Quick Installation Guide, Contact Info for Roost Customer Support, Link to Install Videos & FAQs
  • Requirements: Roost App for iOS 8 (or higher) or Android 4.2 (or higher) devices, Home Wi-Fi, Smartphone, 9V Battery Operated Smoke/CO Alarm

Note: Compatible only with smoke and combined smoke/CO alarms that use a 9-volt battery, including those hard-wired with 9V battery backup. Silence alarm" feature only compatible with smoke and combined smoke/CO alarms.

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