Are there any handheld cordless vac models that use NiMH betteries?
The ones I've used so far (DirtDevil, DustBuster) all use NiCd, and
they had really poor charge capacity - all would run out of steam in
1-2 minutes, even though I'd make sure to charge them for several
hours, or even days, prior to use.
"There is controversy about whether the memory effect actually exists, or
whether it is as serious a problem as is sometimes believed. Some critics
claim it is used to promote competing NiMH batteries, which apparently
suffer this effect to a lesser extent. Many nickel-cadmium battery
manufacturers either deny this effect exists or are silent on the matter."
Says nothing really.
On Feb 1, 3:03 pm, email@example.com (Una) wrote:
Wrong guess, I'm afraid. I've tried using a deep discharge cycle -
e.g., leave the vac turned on for the whole day, then, when I got back
home that night, I'd turn it off and charge it overnight. That didn't
help at all.
Gees. No wonder the batteries didn't charge worth
a hoot. First you overcharged them (the number
one cause of ruining Nicads, and then discharge
them so much that some of the cell probably
reversed polarity, which is almost guaranteed to
ruin the battery.
That's how they work (or don't work). But, 1 minute is a bit short. 2 to 3
is more typical.
I agree with you and would purchase a cordless that used AA NiMHs since they
are so easy to find and inexpensive.
My old Dustbuster runs for plenty of time. I have yet to run it down
completely in over 10 years.After 10 years,I finally needed a new battery
pack.The local DeWalt service center replaced them.
BTW,the cells in the DB pack were designed for continuous charge,so you can
leave the DB on the charger when you are not using it.(DigiKey lists NiCd
cells for this 24/7/365 application)
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