On Jun 12, 4:47 pm, " email@example.com"
cases and connections would be standarized, with just a few case
styles, all easily taking new cells with nothing more than a
there are a limited number of car battery group numbers. most can be
bought from sears or your local store.
not propietory only available from the car manufacturer at 5 times the
wall worts need more standarizations just a few voltages, perhaps all
AC add bridge rectifier to device....
On 6/12/2011 4:47 PM, firstname.lastname@example.org wrote:
Even to the point of being silly. I went to get a battery from a local
autoparts place and grabbed the group type I wanted. Fortunately the
counter guy asked what vehicle it was for and he said "take it back and
get the -RP version". Turns out that the car manufacturer used a
standard form factor battery only with the posts reversed. So positive
was where negative should be and vice versa. That would have cost me a
It is certainly working for cell phones. Up until they were required to
standardize on using micro USB as the connector every cell phone had a
different power cord. I have thrown away dozens of cell phone power
cords and cigarette lighter adapters and probably have a dozen more
useless ones in the drawer because they were all different. It doesn't
help with the battery but now at least all power cords are interchangeable.
because of the heavy transformer that would be needed to change 120VAC to
the lower voltage/higher DC current that the tools use.
For a switcher,it would have to regulate from no-load to full-load,and
would be of considerable size.
alkalines don't have the mAH capacity that rechargeables of the same
physical size have.
because the drills use high currents,the cells need to be strapped or
soldered together. you -can- buy new cells with tabs and solder them
yourself. it's not easy.
rechargeables are recyclable,and many stores accept the dead packs.
Radio Shack for one.You can also take a dead pack to a local battery
rebuilder and have new cells installed for less than what a new pack would
Wall-warts are too underpowered to run a power tool directly.
(at least a -decent- power tool.) plus,you get larger power losses with the
high currents at low voltage,over a longer cable from the WW to the tool.
you end up needing a heavier cable,just like auto jumper cables.
Some are the same physical size and rating,but the pos and neg posts are
reversed in position(and come with an R suffix). My Sentra is like that.
the battery cables won't reach to accept the standard,more common battery
of it's size.
BTW,I'm modifying my old Black and Decker VersaPak batteries to use a
single Li-ion 18650 cell,doubling it's mAH capacity and lighter in
weight,and WAY less self-discharge. I had to use a Dremel to cut off the
tail end of the metal can,the end that's under the plastic cap.
and it's cheaper than replacing the NiCd cells with new ones or NiMH cells.
There's a page on Instructables.com ,if anyone is interested.
Thanks for pointing out some relevant facts.
Sorry I wasn't clear: I meant they should use OTS rechargeables.
Then they could just standardize the strapped assemblies of cells on the
insides of the packs so a user could swap out the whole assembly at once.
After all, if you open up a big 6V lantern battery, you find 8 "D" cells
Check it yourself. You wouldn't even have to cut one open. You can
just look up the dimensions of the standard packs.
I was a bit surprised myself to find eight. There are two series
circuits of four cells each, the two circuits in parallel. Or is it
four parallel circuits of two cells each, in series? The latter, I expect.
Anyway, a lantern pack is eight D cells arranged to give six volts at
double the amperage of four cells.
That's definitely not what *I* saw when I took one apart many moons ago.
Not this guy's experience, either:
This cutaway view shows four, too
Are you sure you weren't cutting up a 12V lantern battery?
Uh oh. You are right. I must have imagined cutting one open. Actually
the dimensions don't match. But if they did, you could build a 6V
lantern battery out of 8 cells as I described. :-)
Thank you for the kind correction.
Anyway the cordless tool makers could standardize the packs so that the
rechargeable battery assemblies could be bought off the shelf and
swapped in and out and easily recycled.
That's OK. I misplaced an entire neighborhood in NYC that I traveled
through for four years in a previous post. I was told that combining cells
in parallel is a no-no. I can't recall why but I can say I can't recall
ever seeing it done that way. Maybe the experts here know.
Did you see the Scopes piece about the 32 AA batteries inside hoax:
Yes. And the Pope could sell off the riches of the Vatican to feed the poor
and pay off molested altar boys instead of letting dioceses take the
bankruptcy route. He could also choose to wear simple robes and walk in the
shoes of the original fisherman, Jesus Christ.
Don't hold your breath on either that or standardized drill packs happening
any time soon! (-:
I have a beard trimmer that uses 3 AA cells in parallel.
One could design adapters for each power tool brand to accept a
"standardized" battery pack,and sell the adapters,"standardized" battery
packs,and smart charger. He could even make his "standardized" battery
packs with easily replaceable cells.(and offer those for sale too)
if there's a market for it.
the higher self-discharge of both NiCd and NiMH precludes their use in low
drain or seldom-used apps. they may self-drain faster than the load drains
altough I noticed today at Wal-Mart that there are new compact power
drivers offered that use AA alkalines....???
maybe somebody wants to prop up dropping alkaline sales.
I've also come to distrust AA and AAA alkalines just because of their
frequent leakage of electrolyte. Brands I used to trust have recently
leaked in a very short time after purchase,despite their "use-by" package
Some stuff is just not replaceable.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.