12 volt battery

A lantern battery is a rectangular battery, typically an alkaline or zinc-carbon primary battery, used primarily in flashlights or lanterns. Lantern batteries are physically larger and consequently offer higher capacity than the more common torch batteries. Lantern batteries comprise multiple cells inside a housing.
The most common variant in the US is the 6-volt square-base battery with spring terminals. In Europe the most common one is the 4.5-volt flat pack.

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  1. A

    Car won’t open and it seems 12v battery is dead

    Hello, I’ve had my mg4 SR for 3 months nearly. I was quite poorly the last two days so never went outside to my car. Today I tried to open my car with the fob to no response. I tried the manual key entry but that didn’t work either. I assume the 12v battery died - my question is how do I now...
  2. B

    MG4 Standard Range 12v Battery Dead and Charging Problem

    Hi all, I want to share an ongoing issue with my MG4 standard range. The car is currently sitting in my driveway, dead as hell. I called the AA and they confirmed on visit the 12v battery is borked and is not taking any charge. The car will be towed to the garage either today or tomorrow. So...
    • bumleopard
    • Thread
    • 12 volt battery 12v battery issue charging problem mg4
    • Replies: 15
    • Forum: MG4 EV Forum
  3. B

    12V battery (theres many of these!)

    Hi guys, Seen a few posts about 12V batteries... I've had issues since delivery. 12V died so was rescued AA, however jumping it didn't work. As a result they recovered to a garage, they replaced the 12V and sent me on my way. Called AA again last week as was dead on drive... they jumped and...
    • buln
    • Thread
    • 12 volt battery 12v battery mg zs ev
    • Replies: 13
    • Forum: MG ZS EV Forum
  4. J

    Flat battery, what could the cause be.

    I woke up this morning to a flat 12v battery on my mg zs ev mk1,AA turned up and jump started it, all seems fine, i normally leave the wirelessly CarPlay dongle and the obd2 reader connected, do these draw power when the car is shut down, or is it just the cold weather that has caused it...
  5. G

    Have anyone here swapped the 12v battery for another manufacturer?

    Have you swapped the original 12v battery for another manufacturer? What did you choose?
  6. G

    Do any quality manufacturers offer 12V batteries for MG4?

    I want another 12V battery in my garage, but quality manufacturers like Varta and Bosch obviously doesn't have it. Is the only option another battery from MG itself, or are there alternatives?
  7. O

    12v battery and Noco booster

    Has anyone had to use this booster or any other in anger and did it work as expected? We all think we know the theory of how to use them on a EV but does that match the actuality. Scenario, you get back to the car and its dead, you had the foresight to buy said item, so dismantle the key ring...
  8. G

    How much does a new 12v battery cost?

    I want another battery in standby, but do I have to order it original? Unlike old cars, there are no avaliable third party batteries when I check other stores. And if no third party avaliable, how much will a new, original cost?
  9. B

    How to feed wires through from cab to 12v battery for 12 amp supply for ham radio?without boring holes?

    Hi I wish to get a 12 amp feed direct from the 12 volt battery into the cab to run a ham radio transceiver. How do I get through the engine compartment without boring holes as its a leased car. Any thoughts. Brian MM0GLX
  10. B

    12V battery charging

    Has anybody found a solution for a portable 12V charger? I’m looking for something to keep in the boot should a 12V battery failure occur while away from home. Standard chargers all require 240V supply and I'm not sure if any portable boosters can be used to trickle charge.
    • BrianC
    • Thread
    • 12 volt battery 12v battery battery charging charging mg4
    • Replies: 76
    • Forum: MG4 EV Forum
  11. G

    Do I have to unplug the 12v battery to charge it?

    Or can I leave the cables connected?
  12. J

    Name this please.

    Hello there , would anyone know the name and the function of this piece is located in the positive terminal of the 12v battery.
  13. C

    Upgrade 12v battery

    The 12v battery seems to be the Achilles heal in many EVs as they are smaller than those typically found in ICE vehicles. Is it possible/economical to replace the 12v battery with a higher capacity offering? Has anyone here done this. Thanks in advance.
  14. S

    Dead MGHS in Italy

    Hi all. Rented this thing in Munich and drove to Italy. No real issues on the way here. Last night, parked and as far as both of us could tell, it was off. We have had it for 3 days and no real issues. It's never been plugged in since I had it. Didn't even know it was supposed to be. Seems like...
  15. P

    MG5 sat for a while on dealer forecourt

    Hi all. What an amazing resource this forum is! I viewed an MG5 LR Exclusive pre face lift today. Pre registered in November 2022 and has 32 miles on the clock. So sat for 9 months doing nothing.. When I turned the ignition on a warning came up for the 12v battery saying it was low. This...
  16. Ian Key

    12v Battery Charging

    Last night when I checked the 12v battery voltage on the iSmart app it was showing 12.2v. This morning at 7:00am it had gone down to 12.1v. I haven't driven the car or unlocked it since yesterday afternoon and the last time it was on charge was 6 days ago. I've just checked it again (10:00am) on...
    • Ian Key
    • Thread
    • 12 volt battery battery battery charging charging mg4
    • Replies: 101
    • Forum: MG4 EV Forum
  17. rogerco

    Dead 12V battery - any help and advice please?

    MG5 SR late 2020. Just got back from 5 days away having left car standing on drive as usual. Car was turned off and locked. Keys (both) wouldn't unlock the car. Appeared completely dead. Unlocked manually and car would not turn on. Opened bonnet and removed cover. Disconnected 12 volt battery -...
  18. O

    MG5 V2 - Not charging 12v battery shocker!

    Seven and a half months in at 3302miles dead in the water - well, A road. Warning 12v failure. Then screen, indicators and drive failed. Still awaiting dealer's answers. RAC recharged the 12v in 25 mins and followed me to the MG dealer/workshop. Anyone else had similar? Frightening and...
  19. M

    MG5 (FL) 12V Battery Drain

    Good evening all, We took delivery of our brand new Piccadilly Blue MG5 in March earlier this year (FL model). We can honestly say that it surpassed a lot of our expectations both in range and charging speed. However, in May the car developed an issue where the 12V battery drained more than...
  20. M

    Relays diagram/scheme

    Please, does anyone have the scheme/diagram of the relays in the box near the 12V battery? (not the fuses, only the relays) thanks in advance.
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