I the meantime I was thinking about getting an external Jump Starter.
I currently have the two 4D AGM batteries that are now 4 years old and not holding a charge well, so I will replace these soon.
I have seen some external Jump Start batteries for less than $200. A lead-acid one from West Marine [big and heavy] and a lithium-ion one from defender [small and light weight]
Any advice pro or con would be appreciated.
Another option is to install another smaller (like group 31) AGM just forward of the current battery location as a backup-- under the aft end of the port settee.
How "seamless" your installation and wiring is up to you. Pretty easy to use a simple marine ON-OFF switch to connect it (positive )to the other batteries or directly to the main battery switch. ON for charging it and using it as an emergency start. OFF for when engine not running/shore power not connected so it doesn't discharge with the other batteries. OR, even simpler, jumper cables you can connect to it.
League City, TX
All mine are flooded lead acid batteries but both golf cart and type 51 are available in AGM.
I typically never use the start battery its there just in case of a failure of the main bank.
Thank you all so much for your prompt and expert suggestions.
As I am "electrically challenged", I will share this detailed information with my mechanic [who is also a sailor] and get started.
Thanks again for sharing your ideas and experience.
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Lake Lanier, GA
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