I have one of those cordless drills that has a 24 volt battery. I was
wondering what would happen if I unplugged the charger from the wall,
and left the battery in it. Will the charger discharge the battery if
I dont pull it out of the charger?
Also, someone gave me an 18 volt drill that has the identical looking
battery, except the battery is an 18 volt, not a 24. That drill did
work when he gave it to me, but his charger died, and he just bought a
new drill. Can I plug that 18V battery in the 24V charger or will I
damage the battery? It does fit into the hole on the charger. I dont
think 6 volts is that much different, but it may be for the battery.
On Fri, 05 Oct 2007 03:12:21 -0500, email@example.com wrote:
Remove the battery from the charger if you are going to unplug the
charger. Whether or not the charger will discharge the battery when
the charger is unplugged depends on its design, but why take the
Don't use a 24 volt charger on an 18 volt battery unless you want to
ruin it. Note that some chargers are designed to be able to charge
several different voltage batteries. But if it doesn't clearly state
on the label or in the instructions that it can do this, don't do it.
Old chargers or chargers that dont measure the limit of the battery
ruin batteries by slowly cooking them. Most all chargers now made
measure the peak voltage of a battery my monitoring just when the
volts drop or temp rise, I guess shuttng off at a certain temp. If the
charger measures temperature it should work, if it measures a voltage
drop other than 24 it should work, if it goes by 24+ v it wont.
[Actualy it might be near 28v ] My new 12v Ridgid charger does 9.6.12
and 18v . If you know the + and - leads and hooked up a digital V
meter to it while the battery was charging and measured the charge you
could see if its ok by what happens. The 18v should peak higher than
18v [near 20v] and the point at which the voltage actualy starts to
drop, indicates full charge, that is also the point at which battery
temp rises. At full charge you must stop or the battery cooks itself
by converting the energy into a mechanical energy, raising its temp.
You can use a higher v to charge, you just have to know when to stop.
A 1.2v nicad is fully charged at maybe 1.36v. So if the 18v is 15 cell
you need more than 20v to charge it.
- A question like that might get you nowhere as phone reps are
- to sell products, tech support or a repair facility might get you
- real answer.
What a bunch of crap.
Do you really think that if I call DeWalt Customer Service and ask
them which batteries their model DW9116 charger will safely handle
they're going to try to sell me something? At a minimum they are going
to transfer me to tech support or an on-line manual. At best they will
get the information themselves and give it to me.
Here, try it: 1-800-4-DEWALT
Let us know what they try to sell you.
IMO,one should check for an online service support site BEFORE phoning
them. It aint that hard these days.Heck,you're already online making these
posts.Instead,some would rather have others do their research for them.
Also,READ any manual you have at home,first.
Because then the guy learns to answer his own questions,and learns more
from it. You'd be surprised at all you can learn just from RTFM.
It also conserves the phone support resource for truly necessary questions
from deserving people.Checking online sources,FAQs first requires no time
from company personnel.
Aural spoken-word bandwidth is far less than even dialup.
First, let's start with the fact that I have, and have read, every
manual for every tool, toy and vehicle I've every owned. OK, maybe
I've finally thrown away the manual from that old '66 Rambler, but I
think you know what I mean. Add to that the fact that if I buy or am
given something that didn't come with a manual, I'll look it up and
However, that won't stop me from picking up the phone, dialing the 800
number and asking a question if that's easier to do at the time or if
the manual is unclear (to me) about the question. Maybe I'm just a
personable guy. Maybe I feel that as a paying customer, I already paid
to have that person waiting with headset in hand (or on head, to be
more precise). Doesn't that make me a "deserving" person?
BTW here's something I find interesting...In one post you said:
- It also conserves the phone support resource for truly necessary
questions from deserving people.
Then in another post you agreed with the following sentiment, calling
it a "Good one!"
"I'll do all I can to keep from talking to those foreign tech
supporters who can't comprehend what I'm asking and don't have enough
english vocabulary to explain the answers I'm looking for."
So which is it? Are the CSR's a precious resource to be reserved for
truly deserving people or are they to be avoided because they can't
speak your native language? I don't believe you can have it both ways.
Even if I could locate an actual company for this drill.......
Long distance calls are expensive in my area, and most companies put a
person on hold for a long time these days. I end up running up a $5
phone bill and wasting a half hour.
And if anyone has any experience with emailing companies lately, 9 out
of 10 companies never reply. In fact I just called a company today
that I emailed 2 months ago, and never got a reply. (not related to
the drills). I wonder if I will get a return phone message?
I agree with you Jim. I'll do all I can to keep from talking to those
foreign tech supporters who can't comprehend what I'm asking and don't
have enough english vocabulary to explain the answers I'm looking for.
I bought this thing (USED) at an auction.
It's some off brand (no-name) drill. But for $20 I cant complain,
especially with 3 good 24v batteries, 2 identical drills, plus a
Then I got that 18volt drill that uses the same shaped battery (also
an off brand).
I'd think that ALL drill batteries should or should not be left in a
charger, which is why I am asking. What is the recommendations?
Can the battery voltage drain from being in an unplugged charger?
I like leaving it in the charger so I know which battery was recently
charged. Otherwise it's a guess...... (the drained ones are set near
the charger). Otherwise it comes down to putting masking tape on the
battery and labelling it by charge date.
chances are,any no-name drill is going to come with a simple charger;no
"smarts",charge times longer than 1 hour(3-5 hrs or more),and will probably
discharge the battery once the line power is turned off,and will overcharge
the pack if left on past the time needed to fully recharge the pack.
examine the charger and see what the charge times are.
open it up if you can and see what IC is controlling the charge.
Then look up the application note for that IC.(Google)
Agree some models (Bosch for example) appear to use the same charger
for several voltage ranges. e.g. 13.8, 14 and 18 volt. But you can't
assume that and you could cook the the batteries or with certain types
overcharge them so they won't discharge properly. (memory effect).
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