[PSUBS-MAILIST] Power sources

[Alan James via Personal_Submersibles]

Hi John,I believe Nuytco switched to lithium iron years ago.I am not sure what kind but life po4 batteries tend to be used as they are the safer technology.There are new battery technologies (lithium sulphur) in the future that will have 4 x the energy density of current lithium iron batteries.These may be out in 2 years.I wouldnt worry about lead acid batteries being heavier & lowering your cg as for one, they are nowhere near as heavy as a solid block of lead & if you replace your lead acid batteries with lithium you can add lead down lower to give you even more stability.A Californian firm, I think West Coast Electrical, were making lithium battery packs for underwater use & had certification for them. They started doing this about 8 years ago.Alan

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  On Fri, 2 Jun 2023 at 2:38 pm, John Bussard via Personal_Submersibles<personal_submersibles at psubs.org> wrote:   Reading Busby and his discussion on the pros and cons of the battery types available at time of publication:

Is there sufficient data as folks move forward in new sub designs re: newer battery types- Specifically Li ion?  
I’m guessing that given the safety hazards there aren’t sufficient advantages to using- lead acid batteries seem to serve the majority of desired profiles.

Is this something that’s changing, or do folks expect to continue using old school batteries?  

Thanks for thoughts and history,
John
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