Can car battery be left on maintenance mode for a period of 5 months?

2006 MERCEDES BENZ C230
96,000 MILES • AUTOMATIC
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VIVEKHB
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  • 93 POSTS
Sir,I am leaving the town for FIVE months.
I have Noco genius G1100 charger. The charger manual says, the battery charger can be safely left connected indefinitely without the risk of overcharging.
Will it be safe to do so.
I replaced my battery in June 2017 at Mercedes dealer.
I have absolutely no issues with the battery till date.
I am enclosing the manual document (underlined)for your reference.
Thanks in advance for your expertise.
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Jun 17, 2026 at 10:49 PM
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STRAILER
  • CAR REPAIR CONTRIBUTOR
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The battery needs to be replaced. I would get a new battery and leave it disconnected until you get back. 9 years for a battery is amazing, most only last about 5 to 6 years. Let me know if you need anything else.
Jun 18, 2026 at 4:09 PM
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VIVEKHB
  • MEMBER
  • 93 POSTS
Thanks Strailer for your valuable opinion.Have a blessed day.
Jun 18, 2026 at 4:18 PM
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STRAILER
  • CAR REPAIR CONTRIBUTOR
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You are welcome, please use 2CarPros anytime we are here to help.
Jun 18, 2026 at 4:33 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.