Something to consider ..........
I have battery boxes that have exterior terminals, 1/4" plug-ins, cigarette
lighter plug-ins, and a meter on the outside to tell you how much juice is
in the battery. Don't remember where I got them, but they ARE available.
Probably a boat supply house. Shop around.
Second consideration .......... get two 6v. batteries and hook together.
They have thicker plates, weigh more, take charging/discharging for many
more cycles than regular batteries, are about the same price, but more
importantly, give you MUCH more amp hours on a charge.
Heart surgery pending?
Read up and prepare.
Learn how to care for a friend.
Download the book.
On Jan 30, 11:59 pm, firstname.lastname@example.org wrote:
I know there has been a fair number of posts on this topic but I'd
also add that oyyu might be disappointed in your marine battery
backup. A smal generator is not very expensive and will run for as
long as you put gas in it.
On Mon, 31 Jan 2011 14:05:44 -0600, email@example.com wrote:
A very large percentage of "deep cycle" and "marine" batteries today
are avaoilable as "sterved electrolyte" or AGM type batteries.
Many of these batteries do not gas at all under normal load or
recharge conditions (they are "recombinent chemistry" batteries or
"valve regulated recombinent" batteries.
Virtually all of the "portable power" systems use these batteries,
including the Motomaster power-boxes.
Switches can cause enough spark to light the gas. Good idea to
pressurize the box with a small muffin fan at the bottom of the end
with the switches and connectors, and vent the box at the top of the
Here in Canada, Canadian Tire sells a box with the battery and
inverter and 12 volt socket all built in under their "MotoMaster
Eliminator" brand. Called the "powerbox 1200" with 60 AH battery.
They also have smaller "powerbox 800" and "powerbox 600" units, and
likely even smaller.
They are made by Xantrex, last I heard.
Why not simply purchase a computer Uninterruptible Power Supply (UPS)?
It will probably cost you less than trying to cobble up something from bits
here and there. And it will come with USB and 120VDC outlets, so you can
charge your iPod as well as power ordinary light bulbs to see the iPod by.
UPSs are available at many price-points with many different runtimes.
APC is a major manufacturer of good-quality UPSs.
I've got two APC UPSs: a Back-UPS RS 1500, and Back-UPS ES 550.
I often work from home, and I NEED stuff to stay up in the face of the
flaky power in my area.
I know this will start a flame war, and I'm not going to respond to it
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
off cost wise buying a standard car battery not a deep discharge
battery. Deep discharge batterys ARE needed for applications where
they will be deeply discharged over and over. A regular car battery
will survive just fine a few dozen deep discharges. Since there is a
large cost savings, you can probably buy two regular car batteries for
the price of one deep discharge.
In any case, as was said, the important thing is not to over or under
charge it. Even a small unregulated charger if left on long enough
will overcharge the battery and shorten it's life.
On Mon, 31 Jan 2011 22:42:24 -0600, firstname.lastname@example.org wrote:
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
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?
Last maybe 4 days
Use for LED lighting MAINLY
and powering small electronic devices and recharging
those devices such as cell phones, netbook etc
I realize it would be impossible to do much more than
that with batteries
plus with a big enough inverter like 3000 watts you can run a big load
occasionally, like a furnace.
some people get a old UPS with dead battery, and hook it to their
vehicle with it running, cheap way to get back up power
On 02/01/11 02:36 pm, email@example.com wrote:
I've seen suggestions that many UPSes will overheat (and even catch
fire) that way: no active cooling because it's assumed that they will
not get too warm before the original internal battery runs flat.
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