# Residents report loud explosion at Electric Vehicle charging station **URL:** \ **Category:** General Discussion\ **Created:** [December 1, 2025, 12:30am UTC](https://community.cartalk.com/t/residents-report-loud-explosion-at-electric-vehicle-charging-station/204533 "2025-12-01T00:30:43Z")\ **Posts on this page:** 5\ **Page:** 2
**Author:** ![MikeInNH](https://avatars.discourse-cdn.com/v4/letter/m/a587f6/32.png) [@MikeInNH](https://community.cartalk.com/u/MikeInNH)\ **Post date:** [December 7, 2025, 3:06pm UTC](https://community.cartalk.com/t/residents-report-loud-explosion-at-electric-vehicle-charging-station/204533/21 "2025-12-07T15:06:48Z")
> [@Robert-Gift](#): > > Our smoke/CO alarms are hard-wire interconnected. Our [smoke/CO alarms](https://www.amazon.com/First-Alert-SC9120B-12-Hardwired-Monoxide/dp/B014KER0J0?th=1) are hard-wired AND have a 10-year battery. Personally, I’ve never seen one that’s ONLY hardwired. In fact you really don’t one that is. If there’s an electrical fire, then your detectors could be rendered useless. ---
**Author:** ![Robert-Gift](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/robert-gift/32/356_2.png) [@Robert-Gift](https://community.cartalk.com/u/Robert-Gift)\ **Post date:** [December 7, 2025, 3:53pm UTC](https://community.cartalk.com/t/residents-report-loud-explosion-at-electric-vehicle-charging-station/204533/22 "2025-12-07T15:53:29Z")
How did you get red? Our house was built in 2000. If no power, which could be caused by an electrical fire, the 9-Volt batteries will sound all of the alarms! When the alarm’s battery gets low (`~`2+ years), the alarm will chirp a low-battery signal. When replacing the battery I also vacuum the detector. When the smoke alarm expires in 10 years, it will sound two beeps every minute. ---
**Author:** ![MikeInNH](https://avatars.discourse-cdn.com/v4/letter/m/a587f6/32.png) [@MikeInNH](https://community.cartalk.com/u/MikeInNH)\ **Post date:** [December 7, 2025, 7:49pm UTC](https://community.cartalk.com/t/residents-report-loud-explosion-at-electric-vehicle-charging-station/204533/23 "2025-12-07T19:49:04Z")
> [@Robert-Gift](#): > > Our house was built in 2000. > If no power, which could be caused by an electrical fire, the 9-Volt batteries will sound all of the alarms! So it does have battery also. ---
**Author:** ![Robert-Gift](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/robert-gift/32/356_2.png) [@Robert-Gift](https://community.cartalk.com/u/Robert-Gift)\ **Post date:** [December 8, 2025, 2:43am UTC](https://community.cartalk.com/t/residents-report-loud-explosion-at-electric-vehicle-charging-station/204533/24 "2025-12-08T02:43:06Z")
Correct. Each hardwired smoke alarm has a regular 9-Volt battery. Nothing special. First I write the date on the battery before inserted. Unfortunately when the smoke alarm double-chirps end-of-life, the unit must be removed. It cannot be reset for a week to allow time to get another smoke alarm. ---
**Author:** ![Robert-Gift](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/robert-gift/32/356_2.png) [@Robert-Gift](https://community.cartalk.com/u/Robert-Gift)\ **Post date:** [December 8, 2025, 2:46am UTC](https://community.cartalk.com/t/residents-report-loud-explosion-at-electric-vehicle-charging-station/204533/25 "2025-12-08T02:46:02Z")
> [@MikeInNH](#): > > _ **So it does have battery also.** _ Correct. Each hardwired smoke alarm has a regular 9-Volt battery. Nothing special. First I write the date on the battery before inserted. #### Unfortunately when the smoke alarm double-chirps end-of-life, the unit must be removed. It cannot be reset for a week to allow another to be bought and installed. [Previous page](https://community.cartalk.com/t/residents-report-loud-explosion-at-electric-vehicle-charging-station/204533.md?page=1)