[AT] OT Now rechargeable tool batteries Re: computers OT

[Dean VP]

Some interesting Lithium Ion information here:

http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries



Dean VP 
Apache Junction, AZ

"If pilots' vision were as bad as economists', Amtrak would be profitable."

-----Original Message-----
From: at-bounces at lists.antique-tractor.com [mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Ken Knierim
Sent: Friday, December 10, 2010 9:25 AM
To: Antique tractor email discussion group
Subject: Re: [AT] OT Now rechargeable tool batteries Re: computers OT

Lithium Ion batteries in many of these applications loose about 40% of their
capacity every year. Ni-Cads tend to have lower power density but keep it
longer, especially if you run them all the way out before you put them back
in the charger. I got my Makita batteries (NiCad) to last better than 10
years by doing this. Run the batteries dry and fully charge them and it
tends to prevent "memory" which lowers the capacity on NiCad batteries. Not
the same beast on the Li-ion ones, from what I've heard.

I do like the Li-ion batteries but at the lower end they do tend to drop off
pretty quick. Think cellphones and whatnot. But high end ones exist; think
Prius batteries, and they don't have nearly the drop-off. My understanding
is that the DeWalt batteries are some of the best anywhere (this second hand
from an engineer buddy of mine) and are worth considering. Our "new" year
old 14 volt DeWalt is still doing very well so I would have to concur with
his assessment so far. No noticeable dropoff so far anyway.

Hope this helps.

Ken in AZ

On Fri, Dec 10, 2010 at 8:48 AM, Gene's Wowway e-mail <gwaugh at wowway.com>wrote:

> Things have been off-topic for a while, I thought I'd throw out a thread
> that I am sure is common to many of us: batteries for cordless tools.
>
> I have two systems going, both Ni-Cad.  A 14 Milwaukee drill/driver and a
> few 18 DeWalt ;tools, the primary one being an impact driver; I REALLY like
> this tool; it sucks screws into almost any wood!
>
> I had the batteries for the Milwaukee rebuilt a year or so ago---IIRC, the
> cost was about half of new.  I am now starting to have trouble (low run
> time) with several of the 18V Dewalt batteries.  This system is popular
> enough that new batteries are relatively reasonable.  Home Depot currently
> has a pack of two De Walt 18V batteries (NiCad) for $99.  This is mighty
> close to what rebuilds would cost, although I might be able to get greater
> amp-hrs by rebuilding.
>
> But with the DeWalt I see myself at decision time....Is it time for me to
> just toss and make the leap to Li-Ion---it would sure be nice to have the
> extended run time, lesser weight etc.)  I think I have answered the buy new
> vs rebuild aspect with what Home Depot has.
>
> Thoughts?
>
> GeneW
> Elgin, Illinois USA
>
>
> -----Original Message-----
> From: Paul Waugh
> Sent: Friday, December 10, 2010 5:23 AM
> To: Antique tractor email discussion group
> Subject: Re: [AT] computers OT
>
> It was 300 baud, but what the heck, what a snail compared to today.  Dewalt
> batteries .....  I think they all suck, I am just not a good battery
> person.
> I bought another battery (14v) for mine ($75?). Andrew now says he has a
> source to rebuild them for much less.  I just don't know how to take good
> care of a battery.
> Paul
> ----- Original Message -----
>
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