reparing battery pack
LSMFT
in the same mAh rating. The originals are 1300mAh, I can replace them
with 2300mAh cells with tabs. Or even 4000mAh ones. Will more mAh hurt
the drill?
--
LSMFT
Force shits upon the Back of Reason...
Ben Franklin-
Phil Allison
"LSMFT"
>
> When I rebuild my drill battery pack with new C nicads do I have to stay
> in the same mAh rating. The originals are 1300mAh, I can replace them with
> 2300mAh cells with tabs. Or even 4000mAh ones. Will more mAh hurt the
> drill?
** Nope.
But it will take proportionally longer to charge as the mAh rating goes up.
BTW:
Who makes 4000mAh Ni-Cds in C size ??
.... Phil
Stephany Alexander
You can also say, "Nobody pounded their pud at the Post Office" but that
doesn't mean that Sitre Magana wasn't caught beating off at the Post Office.
Phil Allison
"Stephany Alexander"
> Phil Allison wrote:
>> "LSMFT"
>>> When I rebuild my drill battery pack with new C nicads do I have to stay
>>> in the same mAh rating. The originals are 1300mAh, I can replace them
>>> with
>>> 2300mAh cells with tabs. Or even 4000mAh ones. Will more mAh hurt the
>>> drill?
>>
>> ** Nope.
>>
>> But it will take proportionally longer to charge as the mAh rating goes
>> up.
>>
>> BTW:
>>
>> Who makes 4000mAh Ni-Cds in C size ??
>>
>
** Giant HUH ????????
I already found that Sanyo make 3600mAh Ni-Cd cells in C size.
Fast charge types too - very cool cells.
..... Phil
Meat Plow
> When I rebuild my drill battery pack with new C nicads do I have to stay
> in the same mAh rating. The originals are 1300mAh, I can replace them
> with 2300mAh cells with tabs. Or even 4000mAh ones. Will more mAh hurt
> the drill?
Better question, will it charge with the stock charger.
--
Live Fast, Die Young and Leave a Pretty Corpse
William Sommerwerck
>> do I have to stay in the same mAh rating. The originals
>> are 1300mAh, I can replace them with 2300mAh cells
>> with tabs. Or even 4000mAh ones. Will more mAh hurt
>> the drill?
> Better question, will it charge with the stock charger?
It should, unless the stock charger /required/ special cells for rapid
charge, or some other condition.
Using NiMH cells should eliminate any problem, as they (generally) tolerate
rapid charging. I used regular NiMH cells for a Polaroid #365 electronic
flash, and the #363 rapid charger handles them fine, even though it was
designed for rapid-charge nicads.
Jim Yanik
news:QRCcp.27351$Pg4....@newsfe22.iad:
> When I rebuild my drill battery pack with new C nicads do I have to stay
> in the same mAh rating. The originals are 1300mAh, I can replace them
> with 2300mAh cells with tabs. Or even 4000mAh ones. Will more mAh hurt
> the drill?
>
>
>
>
No,they will not hurt your drill,as long as the pack voltage remains the
same. it will draw the current it needs,and no more.
Makita switched their packs from NiCd to NiMH for an increase in run
time,NiMH having more mAH,a higher energy density than NiCd.
the drills stayed the same,the charger is where the difference is,for the
different battery chemistry.
NiMH have to be charged differently than NiCds.
NiMH are better cells,IMO.
they keep a charge longer,besides their higher mAH.
I've never seen 4000mAH sub-C NiCd cells,who makes them?
--
Jim Yanik
jyanik
at
localnet
dot com
Mike Cook
> in the same mAh rating. The originals are 1300mAh, I can replace them
> with 2300mAh cells with tabs. Or even 4000mAh ones. Will more mAh hurt
> the drill?
I'd read somewhere that as mA rating goes up for a given cell size the
insulators get thinner and the battery is more at risk from heat (during
charge and discharge) than lower mA cells.
Someone more knowledgeable re. battery chemistry can probably answer here or
at
sci.chem.electrochem.battery
Good luck.
Meat Plow
I'd be cautious of the charger meeting the requirements of 2300 mAh cells
without it struggling.
Been dealing with these issues for many years in battery packs for my
handy talkies. I have a spare 7.2v 1400 mAh pack for my Vertex FT-60.
It won't charge slow but drop it in the rapid charger and it charges just
fine. Doesn't make much sense. I own a Maha multi charger that uses a
temp probe placed on the cells to help decide the charge.
I switched to all NMiH AAA cells for our keyboards/mice hand held GPS
etc.. Two chargers ant 4 packs of 2300 mAh cells. Smartest thing I've
done in awhile.
hrho...@att.net
No, the higher maH means the drill will run longer on a fully charged
battery. Keep an eye on the charger overheating the first few times
you use the new pack as it will draw a little more current from the
charger and will also have to charge longer to fully charge the higher
capacity batteries.
William Sommerwerck
>> tolerate rapid charging. I used regular NiMH cells for a Polaroid #365
>> electronic flash, and the #363 rapid charger handles them fine, even
>> though it was designed for rapid-charge nicads.
> I'd be cautious of the charger meeting the requirements of 2300 mAh
> cells without it struggling.
The charger doesn't "know" the cell's capacity. It just pumps current into
it. The better class of chargers shuts off when a particular cell voltage
(and/or some other condition) has been reached.
> Been dealing with these issues for many years in battery packs for my
> handy talkies. I have a spare 7.2v 1400 mAh pack for my Vertex FT-60.
> It won't charge slow but drop it in the rapid charger and it charges just
> fine. Doesn't make much sense. I own a Maha multi charger that uses
> a temp probe placed on the cells to help decide the charge.
I have two MAHA C9000 chargers. I wish they'd been available 40 years ago.
Meat Plow
>>> Using NiMH cells should eliminate any problem, as they (generally)
>>> tolerate rapid charging. I used regular NiMH cells for a Polaroid #365
>>> electronic flash, and the #363 rapid charger handles them fine, even
>>> though it was designed for rapid-charge nicads.
>
>> I'd be cautious of the charger meeting the requirements of 2300 mAh
>> cells without it struggling.
>
> The charger doesn't "know" the cell's capacity. It just pumps current
> into it. The better class of chargers shuts off when a particular cell
> voltage (and/or some other condition) has been reached.
If it's just a brainless charge that's correct.
>
>> Been dealing with these issues for many years in battery packs for my
>> handy talkies. I have a spare 7.2v 1400 mAh pack for my Vertex FT-60.
>> It won't charge slow but drop it in the rapid charger and it charges
>> just fine. Doesn't make much sense. I own a Maha multi charger that
>> uses a temp probe placed on the cells to help decide the charge.
>
> I have two MAHA C9000 chargers. I wish they'd been available 40 years
> ago.
Forget the model of mine. It was a model probably circa 1996 because AES
had just started to advertise their products. It wasn't something to just
pop 4 AAA cells into. It could charge several different styles. I don't
use it these days since I've bought drop in rapid chargers. It's at my
office in the basement with the rest of my junk or I'd give the model.
William Sommerwerck
>> pumps current into it. The better class of chargers shuts
>> off when a particular cell voltage (and/or some other
>> condition) has been reached.
> If it's just a brainless charge, that's correct.
I'm so accustomed to 0.1C charging that I rarely set the C9000 for greater
than 0.3C -- even though 0.5C charges are /recommened/ by MAHA for its own
cells. I'm afraid of overheating the cells.
The C9000 can do a lot of useful stuff -- break in new cells, rejuvenate old
cells (supposedly), and measure cell capacity. The latter is useful for
assembling packs with closely matched cells. You should also check capacity
when you buy cells, as they're sometimes out of spec. (MAHA says the
tolerance is +/- 10% of the rated value. MAHA will replace low-capacity
cells.)
Sitre Josephenne Magana
> When I rebuild my drill battery pack with new C nicads do I have to stay
> in the same mAh rating. The originals are 1300mAh, I can replace them
> with 2300mAh cells with tabs. Or even 4000mAh ones. Will more mAh hurt
> the drill?
>
>
>
>
cells, you will giving it 4000mA when it was only designed to take 1300mA.
David
news:il64k8$5cd$1...@speranza.aioe.org...
I would not seek electrical advise from that friend in the
future.
David
Spamm Trappe
You need to get a new friend....
Baron
I agree !
--
Best Regards:
Baron.
LSMFT
High-capacity 5000 mAh rechargeable nickel-metal hydride C-cell. 1.2V.
26mm diameter x 50mm long. Standard charge, 16 Hours @ 300mA. Rapid
charge, 2 Hours @ 3000 mA.
Read more
CAT# NMH-C
$5.65 each
This is at All Electronics online catalog.
Phil Allison
"LSMFT"
Phil Allison wrote:
>
>>>> BTW:
>>>>
>>>> Who makes 4000mAh Ni-Cds in C size ??
>>>>
>>>
>>> Just because you don't know who makes them doesn't mean they don't
>>> exist.
>>
>>
>> ** Giant HUH ????????
>>
>> I already found that Sanyo make 3600mAh Ni-Cd cells in C size.
>>
>> Fast charge types too - very cool cells.
>>
>>
>>
> High-capacity 5000 mAh rechargeable nickel-metal hydride C-cell.
** Shame that ain't a Ni-Cd cell.......
NiMH cells have up to 4 times the capacity of Ni-Cds, at least in AA size.
..... Phil
Phoena
his website for posting stupid gas ass shit on his forums.
What's Next, You're going to claim that Dennis the weight trainer is
your best friend even though you kicked his knee and he punched your fat
face like 4 times and knocked you out?