430 Lower battery after driving

I leave my 430 Scuderia plugged with a battery tender.

So I leave parking at full charge and when coming back battery seems much lower. See pics

I wonder whether this is normal. I am worried the battery power gets too low for a perfect gearbox functionality?

Happy to hear your thoughts.

Image Unavailable, Please Login

 

Perfectly normally..heat from drive and drain will be slightly lower than a fully topped off battery .. also there is always a slight float charge that gets dissipated..even if you were to remove charger for 24 hours

That all being said

Check voltage at battery after having fully charged and sitting off charger for 24 hours

Check voltage at battery while cranking

Report back here

 

Check ground straps.

 

To try and judge a cars electrical system status from one of those is ludicrous.

 

Get one of these: https://www.amazon.com/dp/B07NSTQCM8?psc=1&ref=ppx_yo2ov_dt_b_product_details

It should be on every vehicle really that gets stored or has issues with low voltage like our cars. It's a great way to monitor battery health and keep tabs on your alternator as well.

 

Brian

Not sure how you read the posts or what you are adding here
No one is judging the car's system based on the charger
OP stated that the charger "says charging" when he comes back form a ride - I replied perfectly normal to see that as I have seen that on all my cars ( different brands ) with different chargers
I further said ..to make sure monitor voltage on battery terms with a multimeter (implied) to see if he has a problem with battery
I will further state here he should add one more test ... also look at voltage at terminals while car is running

 

I was not replying to you. I never read your post. And yes, the OP was indeed judging his cars system on the charger. But thanks for your concern.

 

As others have said, perfectly normal.

 

Check battery voltage with a meter. Here's the one I use:

https://www.amazon.com/gp/product/B000KIMHRQ/

Google "battery voltage chart" for the type of battery you are running.. but here's one for AGM types:

Ray

Image Unavailable, Please Login

 

Perfectly normal for the Ctek chargers (which is what that is, with a Ferrari sticker on it) to report that level when you first plug it in. If you look at the manual for the charger, those first few status lights mean "yeah I can tell I'm connected to a 12V battery, give me a while to figure out how charged it is".

Manual: https://www.ctek.com/storage/3B398FAECBD7C50C293A4E8883C640EE894DB98C66DAA2F32373B2ADCB02FD09/00000000000000000000000000014050/pdf/media/f9d0203cf44e43dabdbf3248f7f2cc45/MXS_5.0-manual-low-UK-EN.pdf

It should move up through the status lights pretty quickly though - like less than an hour.

if you're that worried get a multimeter on the battery terminals. But mine behaves like this with a brand new Bosch battery so I wouldn't give it another thought.

 

Thank you so much for fall these insights.

I will get that battery volter meter!

Tanks again