Charging points in the engine bay

[gavsadler]

So... with this extended lockdown, and cars parked off for longer than usual, the need for a battery charger is pretty much inevitable.  There's various types on the market, and different types of batteries (Conventional / AGM / Lithium) have different requirements from a charger in order to maintain effectiveness.

This got me thinking, generally speaking, BMW batteries are in the boot, with charging points up front in the engine bay.  Is there any sort of limit as to how much current can pass through these points and back to the battery.

Using me as an example, I've got a conventional 2A trickle charger, which does it's thing over an extended period of time.  A few months back, I also acquired a bigger charger which has multiple output settings, so I can set the charging output to 2A, 6A or 12A.  So, would any output be fine to connect to the charging points in the engine bay? OR is it advised to charge at a lower rate from these points?

If the battery is removed from the car, it's a different story.  I took the M3s battery in one day to be tested, and they juiced it up on a 25A charger for 16hours, after that the battery condition was rated almost new.

Your thoughts / experiences?

 

[TurboLlew]

I use my 5A charger fine with the front access points on both Merc & BMW. I am not sure about higher current.

 

[Kyle]

Yeah I wouldn't personally put too much current through the charging points personally. If a quick charge is required at a higher current than these maintenance type chargers produce, I would rather remove the battery.