# From Quora: New car batteries will not charge once totally dead **URL:** \ **Category:** General Discussion\ **Created:** [April 12, 2022, 1:25pm UTC](https://community.cartalk.com/t/from-quora-new-car-batteries-will-not-charge-once-totally-dead/183539 "2022-04-12T13:25:00Z")\ **Posts on this page:** 9\ **Page:** 1
**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:** [April 12, 2022, 1:25pm UTC](https://community.cartalk.com/t/from-quora-new-car-batteries-will-not-charge-once-totally-dead/183539/1 "2022-04-12T13:25:01Z")
> **[Why are new car batteries lasting only about a year and will not charge once...](https://www.quora.com/Why-are-new-car-batteries-lasting-only-about-a-year-and-will-not-charge-once-it-goes-totally-dead-Ive-replaced-6-batteries-this-year-with-new-My-6-year-old-RV-batteries-are-still-good-and-take-a-charge-just-fine)** > > Answer (1 of 48): It’s likely due to your key being either inside your car or very nearby and you don’t drive it much. > > I had that problem with my Corvette and my wife had that problem with her Audi A4. We keep them both in our garage, with the key... “… our mechanic … had the old battery and replacement battery side by side in the bench. He said lift each battery. I did and the battery from a new vehicle weighed less than half it’s replacement. They were putting the cheapest thing they could find in the new trucks” ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [April 12, 2022, 1:44pm UTC](https://community.cartalk.com/t/from-quora-new-car-batteries-will-not-charge-once-totally-dead/183539/2 "2022-04-12T13:44:40Z")
Why did you post this rambling discussion from random posters from Quora as if they had actual facts? > [@Robert-Gift](#): > > the battery from a new vehicle weighed less than half it’s replacement As for this… my newest (and smallest and lightest) car has the biggest and heaviest battery. ---
**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\ **Post date:** [April 12, 2022, 1:47pm UTC](https://community.cartalk.com/t/from-quora-new-car-batteries-will-not-charge-once-totally-dead/183539/3 "2022-04-12T13:47:13Z")
Lifting a battery is certainly scientific test of a battery . ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [April 12, 2022, 4:21pm UTC](https://community.cartalk.com/t/from-quora-new-car-batteries-will-not-charge-once-totally-dead/183539/4 "2022-04-12T16:21:15Z")
If that discussion was correct, then why are we not swamped by complaints from new car owners about failing batteries? ---
**Author:** ![weekend-warrior](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/weekend-warrior/32/26122_2.png) [@weekend-warrior](https://community.cartalk.com/u/weekend-warrior)\ **Post date:** [April 12, 2022, 4:49pm UTC](https://community.cartalk.com/t/from-quora-new-car-batteries-will-not-charge-once-totally-dead/183539/5 "2022-04-12T16:49:40Z")
I know with the new C8 being so heavy with electronics and computers, that some owners were having problems with their batteries draining overnight. It seems that when the key fob is stored close to the vehicle that it is in constant communication with the vehicle, keeping some electronics on when it would normally be off. ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [April 12, 2022, 5:16pm UTC](https://community.cartalk.com/t/from-quora-new-car-batteries-will-not-charge-once-totally-dead/183539/6 "2022-04-12T17:16:30Z")
> [@weekend-warrior](#): > > It seems that when the key fob is stored close to the vehicle that it is in constant communication with the vehicle That does seem to happen with various new cars. Whenever I get one I’ll get a tin box to store the fob when not in use. ---
**Author:** ![RandomTroll](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/randomtroll/32/12184_2.png) [@RandomTroll](https://community.cartalk.com/u/RandomTroll)\ **Post date:** [April 13, 2022, 2:52am UTC](https://community.cartalk.com/t/from-quora-new-car-batteries-will-not-charge-once-totally-dead/183539/7 "2022-04-13T02:52:23Z")
> [@texases](#): > > Whenever I get one I’ll get a tin box to store the fob [https://youtube.com/watch?v=VsC8cKxSjfk](https://youtube.com/watch?v=VsC8cKxSjfk) ---
**Author:** ![B.L.E](https://avatars.discourse-cdn.com/v4/letter/b/848f3c/32.png) [@B.L.E](https://community.cartalk.com/u/B.L.E)\ **Post date:** [April 15, 2022, 11:04am UTC](https://community.cartalk.com/t/from-quora-new-car-batteries-will-not-charge-once-totally-dead/183539/8 "2022-04-15T11:04:24Z")
I’m currently using a lithium-iron-phosphate battery in my motorcycle. It’s a fraction of the weight of a lead acid battery and they don’t self-discharge when idle eliminating the need for a battery tender during the winter months. But discharge one of these batteries completely just once and it’s toast. The old lead acid battery was still cranking the engine just fine, but it was very difficult to get the engine to start, especially on a cool morning. I thought something was wrong with the engine’s fuel injection but then I noticed that when it did start, the instrument panel would re-boot, the tach needle going all the way to the right and then returning, something it does when you first turn on the ignition. That gave me the clue that the voltage was below a certain threshold during the start. I bought this new battery and now it starts instantly, and the instrument panel does not re-boot after the engine starts. In fact, the lights barely dim at all during cranking. ---
**Author:** ![circuitsmith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/circuitsmith/32/40376_2.png) [@circuitsmith](https://community.cartalk.com/u/circuitsmith)\ **Post date:** [April 15, 2022, 1:39pm UTC](https://community.cartalk.com/t/from-quora-new-car-batteries-will-not-charge-once-totally-dead/183539/9 "2022-04-15T13:39:38Z")
> [@weekend-warrior](#): > > It seems that when the key fob is stored close to the vehicle that it is in constant communication with the vehicle, keeping some electronics on when it would normally be off. Modern electronics (designers): smart yet stupid! Would be so simple for the system to time out and sleep after a minute. > **[Watchdog timer](https://en.wikipedia.org/wiki/Watchdog_timer)** > > A watchdog timer (or simply a watchdog), sometimes called a computer operating properly timer (COP timer), is an electronic or software timer that is used to detect and recover from computer malfunctions. Watchdog timers are widely used in computers to facilitate automatic correction of temporary hardware faults, and to prevent errant or malevolent software from disrupting system operation. > During normal operation, the computer regularly restarts the watchdog timer to prevent it from elapsing, o...