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Deeply discharged car battery - basic questions (no charger around).
Deeply discharged car battery - basic questions (no charger around).
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Old 23rd March 2019, 02:51 PM   #51
Mooly is offline Mooly  United Kingdom
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Deeply discharged car battery - basic questions (no charger around).
Headlights or heated window, it doesn't seem to make any difference. Suppose that makes sense in a way because if it can maintain 12.6 volts then the battery is not being discharged at all.

I've noticed that it also waits a couple of seconds after a stop/start event before increasing the voltage, presumably to aid driveability and not have the alternator suddenly load the engine which could cause a momentary hesitation if you set off immediately.
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Old 24th March 2019, 01:04 AM   #52
phase is offline phase  United States
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Interesting, all for fuel economy and emissions.
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