Battery discharging dashboard Message

whazza · 09-23-2021, 08:48 AM

Hi Folks,

Has anyone experienced a dashboard message when engine is off. This message comes on nearly every day. BMW have checked and cannot find any faults. I also changed the Battery after 5 years, but still getting pop up message.

M5Rick · 09-24-2021, 11:30 AM

Trickle charge it from the engine bay and it should disappear.

F10CPROG · 10-08-2021, 04:36 AM

Quote:

Originally Posted by M5Rick

Trickle charge it from the engine bay and it should disappear.

Do you think charging from the engine bay is better than from the boot?

Blaxwil · 10-08-2021, 07:59 AM

DO NOT charge directly to the battery terminals in the trunk. Charging from the engine bay is the only way you want to charge.

The charge circuit under the hood limits the amps to the battery to prevent damage. Bypassing this and charging directly to the battery will make the circuit think it's weaker than it actually is and will limit the alternator's charge amperage to the battery while driving. Over time the battery will create a low full capacity memory.

Taheemr · 10-09-2021, 07:07 AM

Quote:

Originally Posted by F10CPROG

Do you think charging from the engine bay is better than from the boot?

never always charge from terminals in engine bay

m5rosco · 10-09-2021, 04:12 PM

Quote:

Originally Posted by Blaxwil

DO NOT charge directly to the battery terminals in the trunk. Charging from the engine bay is the only way you want to charge.

The charge circuit under the hood limits the amps to the battery to prevent damage. Bypassing this and charging directly to the battery will make the circuit think it's weaker than it actually is and will limit the alternator's charge amperage to the battery while driving. Over time the battery will create a low full capacity memory.

You learn something everyday!

My Ctek MXS 5.0 charger is attached to a hardwired plug in the boot which is directly attached to the battery. I've never had any issues but what you say makes total sense. I'll remove it sometime and connect to the post under bonnet. Maybe I'll put the plug under the dash or into the drivers dash cubbyhole bit so I don't have to faff about under bonnet every time I want to go out.

09-23-2021, 08:48 AM	#1
whazza Registered 0 Rep 1 Posts Drives: BMW M5 F10 (2016) Join Date: Sep 2021 Location: East Cheshire iTrader: (0)	Battery discharging dashboard Message Hi Folks, Has anyone experienced a dashboard message when engine is off. This message comes on nearly every day. BMW have checked and cannot find any faults. I also changed the Battery after 5 years, but still getting pop up message.
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09-24-2021, 11:30 AM	#2
M5Rick General 68569 Rep 22,081 Posts Drives: M5 F10 DCT Gunmetal Join Date: Aug 2018 Location: GB iTrader: (0)	Trickle charge it from the engine bay and it should disappear.
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10-08-2021, 07:59 AM	#4
Blaxwil Captain 735 Rep 697 Posts Drives: 2015 M5 Join Date: Feb 2018 Location: Atlanta iTrader: (0)	DO NOT charge directly to the battery terminals in the trunk. Charging from the engine bay is the only way you want to charge. The charge circuit under the hood limits the amps to the battery to prevent damage. Bypassing this and charging directly to the battery will make the circuit think it's weaker than it actually is and will limit the alternator's charge amperage to the battery while driving. Over time the battery will create a low full capacity memory.
	Appreciate 0 Quote