|
|
Batteries.com coupons & deals
Batteries.com is a leading online battery superstore: a complete store and information site for batteries, electronics, flashlights, and other mobile products. Batteries.com offers thousands of brand-name products with fast delivery and competitive prices. Batteries.com provides a convenient, private, and informative shopping experience for products essential to your mobile lifestyle.
About "Batteries.com" Answer
|
 |
is batteries.com a reliablewebsite? |
|
I want to purchase a charger
off of it.
http://www.batteries.com/produ
ctprofile.asp?appid=427842
it doesn't look like my
original charger..but its
cheap and I can return it in
45 days...is it reliable or
should i buy it straight from
my manufacturer? |
 |
their a good site. |
|
|
|
Can I use standard householdbatteries to juryrig areplacement laptop battery? |
|
Not so long ago I managed to
get my hands on an old Gateway
Colorbook 2000 tossed from a
defunct insurance company. It
has a 486 processor and little
HD space, but it's great to
take for storywriting when I
go out and about - the
keyboard (and most everything
else) works fine and it's so
old nobody would bother
stealing it.
The problem is the battery.
It's a 12 volt, 3500 mah, but
can barely hold a charge at
all since it's old.
Google provided me with some
sites that have the special
cells that
manufacturers/hobbyists use,
like ...but they are
EXPENSIVE! (5$ for *one* cell
on all-battery.com!)
So the next thought was could
I make one using rechargeable
household batteries? I'd like
to use AA or C batteries, and
if possible Li-on ones if they
make Li0on versions of those!
Also if it can be done how
would I wire them all together
to get the right voltage and
amerage? |
|
yes it could be done but
before you do watch this video
on how to do it , hope this
helps.
http://www.mojoflix.com/Video/
Laptop-Battery-Hack-You-ll-Sav
e.html |
|
|
|
How many batteries would ittake? |
|
How many of these batteries
http://www.trojan-battery.com/
Products/ProductSpec.aspx?Name
=J185H would it take to run
this electric motor
http://cgi.ebay.com/ws/eBayISA
PI.dll?ViewItem&item=270010898
261 for four hours?
I'm trying to determine if the
electric motor could fit in a
pick up truck and fill the
truck bed with batteries. |
|
It could be done, but man what
a pain...
Lets see:
Allowing for inverter and
resistive losses, lets call it
1KW per shaft horsepower,
possibly slightly pessimistic,
but probably in the right sort
of ballpark.
Now That motor rates at around
125HP, so for full power all
the time we need to supply
around 125KW from the battery
bank to the inverter.
For 4 hours duration, means we
need 500KW/h total storage in
the array.
At the 5 hour rate, that
battery rates at 180A/H@12V,
so assume that at the 4 hour
rate it will manage 150A/H@12V
= 1.8KW/H energy per
battery...
Now we need 500KW/H to run
that motor at full power for 4
hours via a suitable inverter
drive.
Therefore we would need around
278 of those batteries to meet
this demand.
@55Kg each this puts the total
array weight at a tad over 15
tonnes!
This arranged in 8 series
strings would give you 417V DC
on the bus which is bloody
dangerous but would be
convenient for the inverter.
At 417V, you need 125,000/417
= 300A total bus current at
full load = 37A per series
string which is reasonable.
Now the one thing that might
make this possible is that you
will not be running at full
power all the time, if you
allow for running at say 20%
power average then your array
might get down to say 4 tonnes
which just might be possible.
The application where this
sort of thing can work is on a
boat where your battery mass
is just used as ballast.
With that much battery mass
you will get very poor
acceleration, so you might as
well go for a much smaller
motor and a lighter storage
array.
Frankly, you are better off
with different motor
technology, and very different
battery tech, switched
reluctance motors were the way
this was going last time I
looked, and one of the lithium
technologies for the power
pack.
Regards, Dan. |
|
|
|
See All Stores
