# POPFIRST L8D Wi-Fi Power Failure Alarm

The POPFIRST L8D is a plug-in Wi-Fi power failure alarm for appliances such as freezers, refrigerators, aquariums, and sump pumps. It is designed to sound locally and send app notifications when it detects an outage, with a backup alarm duration claimed to reach up to 12 hours.

- [Original product page](https://best-deals.pro/product/popfirst-l8d-wifi-power-failure-alarm)
- [View offer](https://best-deals.pro/visit/popfirst-l8d-wifi-power-failure-alarm)
- Market: US
- Language: en-US
- Currency: USD
- Brand: POPFIRST
- Model: L8D
- Category: Electronics > Smart Home & Security > Alarms & Sensors
- Price: 23.99 USD
- Previous price: 29.99 USD
- Discount: 20%
- Price checked: 2026-11-14T07:08:41.380Z
- Rating: 4.3 / 5
- Reviews: 73

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Sends app push notifications over 2.4 GHz Wi-Fi through Smart Life or Tuya, according to the listing.
- A red flashing LED and audible alarm indicate an outage locally.
- The buzzer is listed as adjustable across three volume levels, with a maximum of 110 dB.
- A built-in backup battery is claimed to keep the alert active for up to 12 hours after an outage.
- An extended outlet on the device is claimed to leave a socket available for another household appliance.

## Pros

- Combines an audible alert, flashing LED, and app notification for outage awareness.
- Designed for several outage-sensitive uses, including freezers, aquariums, and sump pumps.
- The listing describes automatic alarm release when power returns, as well as a cancel button.

## Cons

- Remote notifications depend on a 2.4 GHz Wi-Fi connection and app setup.
- SMS and email alerts require a subscription according to the listing. The included app notifications are described as free.

## Specifications

### Identity
- Brand: POPFIRST
- Model: L8D
### Connectivity and controls
- Control methods listed: App, Push Button
### Dimensions and installation
- Dimensions listed: 2"L x 2"W x 3"H
- Weight listed: 0.12 kg
### Alarm and power
- Maximum audible alert listed: 110 db
- Battery type: Alkaline
- Battery quantity and requirement: 1 9V batteries required. \(included\)

## Before you buy

- The listing says the backup alert lasts up to 12 hours and also says to charge the device in an outlet for two hours before use. Treat the duration as a listing claim, not a verified runtime. The title calls this a freezer alarm, but its described function detects power failure rather than freezer temperature. Confirm the selected listing's app, outlet arrangement, and included battery details before purchase.

## A good fit for

- Freezer or refrigerator owners seeking notice of a power interruption through an audible alarm and phone push notification.
- Aquarium or sump-pump owners who want an outage alert, provided their Wi-Fi and app setup are suitable.

## Less suited to

- Buyers who need temperature monitoring or a freezer-door-open alert. The described device detects loss of power, not those conditions.
- Buyers who require SMS or email alerts without a paid app subscription.
- Locations without compatible 2.4 GHz Wi-Fi if remote app notifications are needed.

## Customer feedback

Customer feedback is positive about connectivity and functionality, including reports of phone notifications when connected to Wi-Fi. That is relevant to the L8D's stated 2.4 GHz app-alert design, but feedback does not establish performance in every network or setup. Aggregate ratings lean favorable overall while still including a notable lower-rating share, so they do not remove the need to account for app and Wi-Fi dependence.
- Positive themes: Customer feedback describes connectivity and functionality positively.

## Frequently asked questions

### Does the POPFIRST L8D monitor freezer temperature?
No temperature-monitoring function is specified. The listing describes an alarm that detects power failure, so it should not be treated as a temperature alarm.
### Which Wi-Fi band does it support?
The listing specifies 2.4 GHz Wi-Fi and names Smart Life and Tuya for app notifications.
### How long does its alert continue during an outage?
The listing claims up to 12 hours of alerting after an outage and says to charge it in an outlet for two hours first. That runtime is a manufacturer claim, not an independently verified result.
### Are text and email notifications included?
The listing says app notifications are free, while additional SMS and email settings require a subscription.

## Alternative options

- [GoveeLife WiFi Refrigerator Thermometer 1-Pack with Gateway & LCD Display \| Freezer alarm fridge monitor with app alerts & anti-false, 197ft range, 2-yr data export. For freezer/fish tank/hot tub](https://best-deals.pro/visit/popfirst-l8d-wifi-power-failure-alarm)
- [110V Sump Pump Alarm, 110dB High/Low Water Level Alarm with LED \| 16ft Probe Cable, 30-110dB Loud Siren, Adjustable Volume, for Sewage Pumps and Basements](https://best-deals.pro/visit/popfirst-l8d-wifi-power-failure-alarm)
- [WiFi Power Failure Alarm with SMS & Email Alerts, 120 dB Audible Alarm Power Outage...](https://best-deals.pro/visit/popfirst-l8d-wifi-power-failure-alarm)
- [WiFi Freezer Alarm Refrigerator Thermometer, App & Email Alerts \| Garage, chest fre...](https://best-deals.pro/visit/popfirst-l8d-wifi-power-failure-alarm)
- [Freezer Door Alarm When Left Open with 0-4Mins Delay, White 1PC \| 0-120dB Adjustabl...](https://best-deals.pro/visit/popfirst-l8d-wifi-power-failure-alarm)
- [Power Failure Alarm WiFi, Smart Power Outage Alarm, App Remote Cancel Alert \| App C...](https://best-deals.pro/visit/popfirst-l8d-wifi-power-failure-alarm)
- [GoveeLife WiFi Refrigerator Thermometer 2-Pack with Gateway & LCD Display \| Freezer alarm fridge monitor with app alerts & anti-false, 197ft range, 2-yr data export. For freezer/fish tank/hot tub](https://best-deals.pro/visit/popfirst-l8d-wifi-power-failure-alarm)
- [GoveeLife WiFi Refrigerator Thermometer Sensor with Alarm, 2-Pack & Gateway \| Monitor fridge/freezer temp remotely with app alerts & buzzer 230ft range. For kitchen/hot tub, only support 2.4G Wi-Fi](https://best-deals.pro/visit/goveelife-refrigerator-thermometer-lite-h5111-two-sensors-gateway)
- [WiFi Freezer Alarm & Refrigerator Thermometer, App & Email Alerts \| App & email ale...](https://best-deals.pro/visit/popfirst-l8d-wifi-power-failure-alarm)
- [Freezer Thermometer with Alarm – Digital Refrigerator Temperature Monitor with 2 Pr...](https://best-deals.pro/visit/popfirst-l8d-wifi-power-failure-alarm)
- [Power Failure Alarm WiFi, Smart Power Outage Alarm, Free App Notifications \| Mini S...](https://best-deals.pro/visit/popfirst-l8d-wifi-power-failure-alarm)
- [Power Failure Alarm WiFi, Freezer Outlet Alarm Power Loss, App Remote Mute \| Smart ...](https://best-deals.pro/visit/popfirst-l8d-wifi-power-failure-alarm)

## Add-ons

- [GoveeLife WiFi Refrigerator Thermometer Sensor with Alarm, 1-Pack & Gateway \| Monitor fridge/freezer temp remotely with app alerts & buzzer 230ft range. For kitchen/hot tub, only support 2.4G Wi-Fi](https://best-deals.pro/visit/goveelife-refrigerator-thermometer-lite-h5111-wifi-gateway)

## Images

![POPFIRST L8D Wi-Fi Power Failure Alarm — 1](https://best-deals.pro/i/gZSUjDZL4eTV3xItca4PJcBvo7V6eQ_5h2qOk3CzkgQSXq8cCc0PElWY-UjQ1NqUV52HowNUaZ43TGScrXLztQ8vz1wdmSf68KYttFhGJ5WHMsHEIqF89eef.jpg)

![POPFIRST L8D Wi-Fi Power Failure Alarm — 2](https://best-deals.pro/i/XpBQqunKXzYZFcuZ-XMJfxHw3FvYWonKIend3Mq2bDnRqv1QVxWyAerPhpai2d8nEz33eDy6QunrjEoXvAbOUK1Sxq9W2NHcfFPeOOq1FAxv42eWqX0S2Ysk.jpg)

![POPFIRST L8D Wi-Fi Power Failure Alarm — 3](https://best-deals.pro/i/rlpHg5is3LfjG6CjS0vRfVMOopRiXh8oxnp3URKnZ0sm45Q_geDSmp_-XIMSqyO4tXrRLiRMK3oy0h-6di3pJub93vQWT6P2bGTQSziXGOymFeMIlYIb4yWN.jpg)

![POPFIRST L8D Wi-Fi Power Failure Alarm — 4](https://best-deals.pro/i/eyW65fuELNoa_XBG9w610SSCs9Kp-wh9VHbvap2NOWBwrLKYgGiS-KmLj3IPk_lQ0a981VUOlDcbs9BsRjSzheVsFbPz2Kx60xXqaLmnTXCrpCDtMyVVwhQu.jpg)

![POPFIRST L8D Wi-Fi Power Failure Alarm — 5](https://best-deals.pro/i/V60bPk17zKfITFtGypCNDDRj9zh3LXxVS_Jbv3QdfXvOTFJcRx_-EUff9NJLMyo26TN_2qGUN4TIg5a-g4EClFu4Duau98mxDwwFTH5kvrbJbc5Xrlk4OQuJ.jpg)

![POPFIRST L8D Wi-Fi Power Failure Alarm — 6](https://best-deals.pro/i/Y3QmxujHAGpFvgIOzn2b3DhbbcCLBqD5BoP7HIqJ5xXeJ4mr5e_l2k5AzA5wlK8OUngPzWtaTGHlPWIe2jA3BxhQIdQDC1c0ZccBD6rHI_gnkw6wMjbDWt4P.jpg)

![POPFIRST L8D Wi-Fi Power Failure Alarm — 7](https://best-deals.pro/i/iwclFXPVw_6GUw9NHxF5jtxhDNn5D870Rd2ciF1gOoVm2GuaUGO0wKxUrTNACgNucqZyYli_0IpoMM8zCYLtin3a4awhtPajjfVooTcRGAPcHn_967C3Yapc.jpg)