GLC Class (X253) Produced 2016-2022

Battery charging

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Old Sep 2, 2019 | 01:04 PM
  #1  
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Glc300 4matic
Battery charging

Hi fellows,

I am looking forward to some ideals for my questions about battery charge on my brand new glc300.

(1) the mobile app (Mercedes me) shows me that the battery is fully charged, but the trickle charger (Noco G1100) shows me that the battery is 75% charged . Which one is correct?

(2) in the above-mentioned situation, if the mobile app shows correct reading, and the trickle charger is still connected to the battery and keeps charging the battery (because it detects only 75% charged), will the battery get damaged because of overcharged?

(3) after the battery is fully charged (100% charged green light on solid), I drive the car for about 15km and then connect the trickle charger to the battery again, the trickle charger shows only 75% charged. Is this right? Or the battery is not getting charged during running?

(4) which is the best way, keeping fully charged or 75% charged, in order to extend the battery life longer?

Thank you very much in advance for any advices .

Ben
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Old Sep 2, 2019 | 02:21 PM
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'19 E63S sedan
Originally Posted by Benlee
Hi fellows,

I am looking forward to some ideals for my questions about battery charge on my brand new glc300.

(1) the mobile app (Mercedes me) shows me that the battery is fully charged, but the trickle charger (Noco G1100) shows me that the battery is 75% charged . Which one is correct?

(2) in the above-mentioned situation, if the mobile app shows correct reading, and the trickle charger is still connected to the battery and keeps charging the battery (because it detects only 75% charged), will the battery get damaged because of overcharged?

(3) after the battery is fully charged (100% charged green light on solid), I drive the car for about 15km and then connect the trickle charger to the battery again, the trickle charger shows only 75% charged. Is this right? Or the battery is not getting charged during running?

(4) which is the best way, keeping fully charged or 75% charged, in order to extend the battery life longer?

Thank you very much in advance for any advices .

Ben
It's normal for a charger to more fully charge the battery than the alternator. My charger takes up to 48 hours to reach that stage.

I would only use a charger with a true AGM mode, not a "cold/AGM" mode that's really neither. I use this charger, which automatically compensates for temperature and has a true AGM charging protocol.
https://www.amazon.com/gp/product/B00CD44RQO/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 https://www.amazon.com/gp/product/B00CD44RQO/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

This one is safe to leave connected for weeks.
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Old Sep 2, 2019 | 07:29 PM
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Glc300 4matic
Originally Posted by whoover
It's normal for a charger to more fully charge the battery than the alternator. My charger takes up to 48 hours to reach that stage.

I would only use a charger with a true AGM mode, not a "cold/AGM" mode that's really neither. I use this charger, which automatically compensates for temperature and has a true AGM charging protocol.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

This one is safe to leave connected for weeks.

Hi whoover,

Thank you very much for your message. Can I connect the trickle charger to the battery with a lithium mode?

Ben
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Old Sep 2, 2019 | 07:47 PM
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Originally Posted by Benlee
Hi whoover,

Thank you very much for your message. Can I connect the trickle charger to the battery with a lithium mode?

Ben
Not safely. The battery is AGM and has unique charging characteristics. A true AGM charger is the only safe option.
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Old Sep 3, 2019 | 12:03 AM
  #5  
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Originally Posted by whoover
Not safely. The battery is AGM and has unique charging characteristics. A true AGM charger is the only safe option.
Hi whoover,
Thank you very much for your advice.

Ben
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Old Sep 3, 2019 | 12:18 AM
  #6  
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2016 GLC 250d AMG pack, 2017 GLC Coupe 250d AMG pack , 2002 BMW 330Ci convertible, 2021 BMX X1 sD20i
Fully endorse Whoovers comments. CTEK charger on AGM mode works very well. Not necessary to keep fully topped up, depends on your driving distances, lots of short trips, then 1 day a month to recondition and charge battery should be more than sufficient to extend life of battery.
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Old Sep 3, 2019 | 06:41 PM
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Originally Posted by Teckno
Fully endorse Whoovers comments. CTEK charger on AGM mode works very well. Not necessary to keep fully topped up, depends on your driving distances, lots of short trips, then 1 day a month to recondition and charge battery should be more than sufficient to extend life of battery.

Hi Techno,

Thank you very much for your advice. I drive about 20km daily, so I will take your suggestions.

Best regards,

Ben
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