My cut off point is about 12.4 volts, anything lower I won't buy it.Īm I being a bit over zealous, what do you think a respectable voltage is for a brand new 12 volt battery? I like to see at least 12.6 volts. LI LEAD Auto Starter 12V Car Battery Protector - Automatically Disconnect System For Car Battery Saver, Battery Voltage Disconnect Kit, Battery Buddy. At 25 charge, the voltage will measure around 12 volts. With the battery charge at 75, the voltage can drop to 12.4 volts. A fully charged car battery voltage falls between 13.7 and 14.7 volts with the engine running. I've bought more than a few batteries over the years and have learnt that it's a good idea to take a volt meter along to test a battery before I buy it. The voltage of a car battery should be between 12.2 to 12.6 volts when the engine is turned off. I got my refund but it wasn't a pleasant experience. Over time, those accessories will discharge the battery and we let it sit for a week, to see what. While this car is 20 years old, it does have some electrical accessories that stay on, even when the car is parked, like the clock in the radio and the seat memory. They tried to replace it with another one which also read 11.9 volts, which I also politely pointed out was completely discharged and not fit for sale.Īfter the ensuing verbal spat, telling me in not so uncertain terms what a freak I was and that they'd seen plenty of batteries come back to perfectly serviceable life after dropping to two volts. The 12-volt battery in this 2001 BMW Z3 is fully-charged at about 12.6-12.8 volts. I took the battery back to the bike shop and tried to explain to them that this battery was in extremely poor state of charge for a brand new battery. When I got it home I measured it with my volt meter and it read 11.81 volts. I recently purchased a brand new 12 volt AGM motorcycle battery.
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