A
Anonymous
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A good how-to:
https://youtu.be/lKRj8gLcsfI?fbclid=IwAR1WuvjLUO7P3SCErXg-hIkaSZ-zp3_rcOnAs8O9HUK3JTD4MaseJOhHuxg
https://youtu.be/lKRj8gLcsfI?fbclid=IwAR1WuvjLUO7P3SCErXg-hIkaSZ-zp3_rcOnAs8O9HUK3JTD4MaseJOhHuxg
I have disconnected our i3's 12 V battery 3 times for periods of 6 - 9 months each time. After reconnecting the battery, our i3 has always entered drive readiness state and performed normally, so I would expect the same when I install our new 12 V battery before registering it. I will decide whether to pay an independent BMW mechanic to register our new battery or whether to buy a tool that can register it.Srivenkat said:I am also curious to hear from the OP if the car would start before registering. Also, could registration be avoided if a backup battery is connected to the terminals making sure battery power is always there thru the switchout, assuming the battery being replaced is weak but isn't completely dead.
YesSrivenkat said:Also, on the Toyota hybrids, the 12V does the minimal task of connecting the HV battery to the rest of the system on startup, apart from running some ancillaries while the car is off. Does the i3 battery do this (connection of the HV battery) as well?
Apparently not.atmoicmiata said:Does anyone know if the BimmerLink app will register an i3 battery?
atmoicmiata said:With the car off, my 12v battery measures 13v.
I'm good for now, right?
13.0 V is higher than the resting voltage of a fully-charged AGM battery. If you measured this voltage shortly after shutting down your car, the battery's voltage was likely not the resting voltage and was slowly declining to its resting voltage.atmoicmiata said:With the car off, my 12v battery measures 13v.
I'm good for now, right?
As suggested, the resting voltage isn't a definitive determination of the health of a lead-acid battery.
Would that provide the same health determination as a battery load test?MKH said:To do a battery health test, you need to use a conductance tester.
Would that provide the same health determination as a battery load test?
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