Battery charging strategy
Discussion
Hi all. Can someone explain what the battery meter should be doing in an R8? On starting mine drops to 12V and stays there for up to 5 seconds. Then the needle kicks round to 15v for a couple of minutes before dropping to around 13v. Then this morning I noticed it stayed around 14 for the whole trip.
I've also noticed on 2 occasions certain features are forgotten on startup, auto lock, trip computer etc. bit like the battery has been pulled. Diagnostic mode shows battery voltage at 12.2 and battery life at 80+%. Any clues if anything is amiss? Cheers Karl.
I've also noticed on 2 occasions certain features are forgotten on startup, auto lock, trip computer etc. bit like the battery has been pulled. Diagnostic mode shows battery voltage at 12.2 and battery life at 80+%. Any clues if anything is amiss? Cheers Karl.
karl_h said:
Hi all. Can someone explain what the battery meter should be doing in an R8? On starting mine drops to 12V and stays there for up to 5 seconds. Then the needle kicks round to 15v for a couple of minutes before dropping to around 13v. Then this morning I noticed it stayed around 14 for the whole trip.
I've also noticed on 2 occasions certain features are forgotten on startup, auto lock, trip computer etc. bit like the battery has been pulled. Diagnostic mode shows battery voltage at 12.2 and battery life at 80+%. Any clues if anything is amiss? Cheers Karl.
karl, I am not sure how accurate the BM dials are. the cars can take a few seconds for the battery dash light to extinguish and yes they can show 12v and then go to 13-14 after a few seconds I've also noticed on 2 occasions certain features are forgotten on startup, auto lock, trip computer etc. bit like the battery has been pulled. Diagnostic mode shows battery voltage at 12.2 and battery life at 80+%. Any clues if anything is amiss? Cheers Karl.
Mine was charging at 15v. Checked with a meter & it was true. Dropped back down to a better 12-14v after 15 mins or so.
Car is pretty new, 9,000 miles 18 months old.
Cleaned the battery terminals and it seems to have settled down to 'normal'.
Remember the battery is in the rear, there's a possible drop in voltage due to length of cable, could be.
John
Car is pretty new, 9,000 miles 18 months old.
Cleaned the battery terminals and it seems to have settled down to 'normal'.
Remember the battery is in the rear, there's a possible drop in voltage due to length of cable, could be.
John
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