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The more shallow the discharges, the more cycles you get
The deeper a battery is discharged, the fewer cycles you will get from it.
The chemical process going back and forth each time is not perfect.
If your battery is allowed to get low then used for a slow and low start,
that's taking it for a deep cycle.
On the AGM batteries we use for our solar equipment we get 5-7 years of DAILY cycles.
But those cycles are less than 5% discharge each time, so last for years.
As designed.
Better to keep your battery trickle charged from a small solar charger,
to offset its internal loss rate,
than to let it get low.
And then start at or near full charge each time, so the battery doesn't deeply discharge.
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I am amused by the claims of EV's. Only in the fine print are you advised to avoid charge over 80% or under 20%. Which means at best, on average, you should limit your use to only 60% of the advertised 'range' (And that's when new).
Then age the battery, get it very cold, deeply discharge it a bunch of times,
charge to 100% for some long trips...etc....
Don't get me started.
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David Wartofsky
Potomac Airfield
10300 Glen Way
Fort Washington, MD 20744
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