DIYbanter - View Single Post - Use deep discharge marine battery as emergency power source?

Jim Elbrecht

On Mon, 31 Jan 2011 22:42:24 -0600, wrote:

Mark wrote:

if you want this battery only for EMERGENCY power meaning that you are
going to deep discharge it once or twice a year, then you are better

Actually I am now thinking abt FORGETTING a deep
discharge battery... and instead basing some kind of
system off portable rechargeable drill batteries that
are LI-ON

That's a whole nuther ball game. Lead acid cells do what they do
very well. LI-ion cells do what *they* do very well. I don't
think there is a whole lot of overlap in what they are both suited
for.

There are reasons that cars use lead acid and drills use li-ion.

What are proposing to power? How long are you guessing the
emergency will last? How often will you need to supply emergency
power? Will you see it coming?

Jim