Actually there are recharable alkaline cells. I used to have some and
they worked pretty well. I am not sure if they still make them. NiMH
are much better. If you try to recharge ordinary alkaline cells it is
not worth the effort for the small charge you may get.
I don't know how good it is or if it is a scam but last year I had 20
outdoor rechargeable yard lights, some to battery and some four battery
all with rechargeable batteries and most were over a year old and dying
. I replaced all of the batteries with non rechargeable energizers and
they are still going and have been running every night for a year. I do
not know if they are getting a charge like the ones that were in the
lights when they were purchased.
I've found that standard alkaline batteries have more capacity than many
rechargeable batteries ...especially nicads which are only 1.2 volts. I
have never tested a rechargeable alkaline battery though.
I've got a Battery Manager Ultra (no longer
made) and a Re-Nu (will made) for AA and
AAA cells. They both put power back into
alkaline cells. Some will leak (maybe 25
to 40% of the cells leak). If a battery is
slightly discharged, it freshes up better,
and less likely to leak. Cells deeply dis
charged more likely to fail and leak.
I charge the cells, and put into the plastic
holders with paper towels or toilet paper
below the cells, wait a week or two. Pitch
out the leakers, and check the cells for
charge before using. Lot of work for not much
I've not compared first use to recharge. Less,
but not sure how much less.
Theoretically, and practically, yes. However the rechargers DO get a
little bit of extra power out of the batteries because the reaction is
not TOTALLY non-reversible. About 25% charge in "real world" -
making it really not worth the expense and effort.
This is assuming regular alkalines. There ARE rechargeable alkalines
that work VERY well. - like "pure energy" and "envirocell". They are
only good for about a dozen recharges - but unlike NiCads et al, they
hold their charge for years. Their charge efficiency is also better
than NiCad and NimH
On 3/31/2014 2:16 PM, firstname.lastname@example.org wrote:
For AA cells, some folks have had good results
with Powergenix. They are higher voltage than
alkalines. Special charger needed. Not very
forgiving of deep discharge. But, they do work.
I've used them on occasion, with success. Great
for digital cameras, or computer speakers.
I know there are rechargeable alkaline batteries (developed in Canada).
'Rechargeable alkaline battery - Wikipedia, the free encyclopedia'
However, this ad says that it can discharge ANY battery and even shows a
pile of Duracell non-rechargeable batteries if you click on
"Specifications" and that's gotta be false. If anyone developed a
recharger that would recharge disposable alkaline batteries, it would be
big news, and so far I ain't heard nuthin.
How many times can an ordinary alkaline battery be recharged?
Would you believe hundreds of times? The trick is to stop using the
battery well before it has given up all of its available stored energy.
Note that this is directly opposite to the instructions that were packed
with your battery-operated drill or screwdriver with its NiCad
batteries. When the drill stops turning, charge the battery, but not
before. Good rule for NiCads, but not for alkaline batteries.
Assuming you now have a charger to safely charge alkalines, don't wait
for the battery to stop working. In order to achieve ten times extension
of the normal life of an everyday alkaline battery, you will have to
recharge it frequently, many more times than ten. It makes sense to use
a second set of batteries for a high drain device. Take out one set of
batteries when the device is not being used, and put in the second set
that has been recharged. Charge the first set and carry it with you as a
backup if necessary.
You will be surprised how easily children will be attracted to charging
their own batteries in their toys and possessions. Managing their own
batteries is fun, and they know it helps the environment by not having
to throw batteries away when they can recycle them.
Why did it take so long for a good alkaline charger to be developed?
There have been many more failures than successes along the road to
developing a good charger. Products were announced, and then you didn't
see any more of them. The reason is simple -- they didn't work. One came
close to working, the Buddy-L SuperCharger, announced in 1993. Popular
Science magazine named it as one of the 100 top scientific achievements
of the year. But it did not live up to expectations. Apparently, the
product was launched into production too quickly, and sub-standard
operation resulted. Fortunately, the problems did not hurt the
batteries. The batteries simply switched off prematurely before charging
was complete, and the users had to restart the charging process several
times. Also, it was not designed for easy battery insertion, always
requiring two hands and a struggle. Eleven years later, many people are
still using their SuperChargers and are reluctant to part with them.
All the background information was absorbed and a totally re-engineered
product emerged, the Battery Xtender Tests have shown that it does
live up to expectations, and that the claims of ten times life extension
for ordinary alkaline batteries are not exaggerated. The case has been
redesigned to allow easy one-handed access to the batteries, and it
occupies much less space on a desk, table top or counter.
On Monday, March 31, 2014 9:19:19 PM UTC-7, H oM eG uy wrote:
BS, and don't trust Tested.com.
Even NiMHs and NiCads sometimes can't be recharged hundreds of
times, and the manufacturers of rechargeable alkalines have
claimed only about 10-30 recharges. In the 1970s Mallory (now
known as Duracell) made rechargeable alkalines, and either
Duracell or Energizer tried to sell them in the 1990s, but both
times those alkalines just didn't work well, even when users
did as you said and recharged them when they were still near
Wireless World once featured a charger for regular alkalines.
It would repeatedly charge for a few milliseconds and then
load down the cell for a few milliseconds to check its state of
charge, and a full charge for a D cell took something like 30
hours. This was an old design, not based on any microcontroller.
The article mentioned the importance of not overcharging and
showed a chart relating state of charge to internal pressure.
Cells could reach 70 PSI when overcharged.
Tested.com once tried the Wet Circuits power strip, claimed to
be safe even for use in very wet conditions:
Why didn't those people get shocked? Because the 120VAC came from
a grounded circuit, and even if had been connected to only a 2-wire
circuit, it's likely any electrical leakage would have been
conducted by the neutral wire, instead of through any humans. But
there's always the possibility of loss of neutral, which creates
a very dangerous condition for ungrounded circuits. Also the
Wet Circuits power strip was falsely claimed to be UL approved for
safety, but UL said otherwise:
So why should you trust Tested.com about an alkaline recharger
when it couldn't even catch something as simple as an obviously
dangerous power strip?
On Tuesday, April 1, 2014 5:30:08 AM UTC-7, Stormin Mormon wrote:
Because we three have cited proof, unlike somebody in the
newsgroups who keeps preaching a false prophecy fabricated
by a pedophile and convicted con artist whose tale has
never been shown to have any archeological proof,
according to even its followers. I'm not saying it's
crazier or less valid than other beliefs, just that its
original prophet wasn't at all sincere, unlike the true
believer bipolar or schizophrenic prophets of ancient
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