On Thursday, September 19, 2013 2:53:28 AM UTC-5, asdf wrote:> On Tue, 17 Sep 2013 18:09:39 -0700, Andy K wrote: > > > > > I will go for non-Chinese brands which is probably the cardboard > > > jacketed batteries that are in the original battery. > > > > Nearly all batteries are made in China, but those cheap crappies they > > sell on Ebay or unreliable online stores are certainly fakes with no > > quality control behind their manufacturers shoulders. > > > > The point is: whenever something cheap can be easily rebranded to look > > and be sold as something much more expensive, it usually will be. > > > > This applies to resistors, capacitors, transistors, chips, batteries, > > memory cards and modules, etc. ...Tubes too! > > I was bitten in the past by fake metal film resistors and today I have 2 > > bags of 2SK170GR from diferent Ebay sellers, they are 100% identical at > > magnifier inspection and work ok, but I had to change their operating > > current depending on what bag they're picked from because they behave > > very differently, which could mean at least one bag contains fakes.I am sorry you did not get your money's worth. I got 8 name brand NiCads C-type for $17. After I install them, I'll charge it up and test the run time. If they don't come close to what was advertised, the seller will get some real bad ratings. And I'll probably tell 10 or more people too. andy
NiCd cell replacements
Started by ●September 17, 2013
Reply by ●September 19, 20132013-09-19
Reply by ●September 19, 20132013-09-19
On 9/19/2013 8:03 AM, Andy K wrote:> On Thursday, September 19, 2013 2:53:28 AM UTC-5, asdf wrote: >> On Tue, 17 Sep 2013 18:09:39 -0700, Andy K wrote: >> >> >> >>> I will go for non-Chinese brands which is probably the cardboard >> >>> jacketed batteries that are in the original battery. >> >> >> >> Nearly all batteries are made in China, but those cheap crappies they >> >> sell on Ebay or unreliable online stores are certainly fakes with no >> >> quality control behind their manufacturers shoulders. >> >> >> >> The point is: whenever something cheap can be easily rebranded to look >> >> and be sold as something much more expensive, it usually will be. >> >> >> >> This applies to resistors, capacitors, transistors, chips, batteries, >> >> memory cards and modules, etc. ...Tubes too! >> >> I was bitten in the past by fake metal film resistors and today I have 2 >> >> bags of 2SK170GR from diferent Ebay sellers, they are 100% identical at >> >> magnifier inspection and work ok, but I had to change their operating >> >> current depending on what bag they're picked from because they behave >> >> very differently, which could mean at least one bag contains fakes. > > I am sorry you did not get your money's worth. > > I got 8 name brand NiCads C-type for $17. > > After I install them, I'll charge it up and test the run time. > > If they don't come close to what was advertised, the seller will get some real bad ratings. > > And I'll probably tell 10 or more people too. > > andy >If you got 8 REAL C-cells for $17 delivered, I'd like to know where. Do report their measured capacity, ESR and self-discharge rate. Measure the cells before you install them. Don't remember if you're in the solder-em camp, but that's likely to affect the results...and any claim of defect.
Reply by ●September 19, 20132013-09-19
> Measure the cells before you install them. > Don't remember if you're in the solder-em camp, but that's likely > to affect the results...and any claim of defect. >The batteries aren't very expensive from real dealers, and you get the tabs. I tend to avoid ebay for components. I've used TNR for personal projects and commercial projects. They do good work. BTW I assume SAFT cells are made in Germany. The Germans don't take kindly to slapping their name on made in China products.
Reply by ●September 19, 20132013-09-19
On 9/19/2013 3:45 PM, miso wrote:>> Measure the cells before you install them. >> Don't remember if you're in the solder-em camp, but that's likely >> to affect the results...and any claim of defect. >> > > The batteries aren't very expensive from real dealers, and you get the > tabs. I tend to avoid ebay for components. > > I've used TNR for personal projects and commercial projects. They do > good work. > > > BTW I assume SAFT cells are made in Germany. The Germans don't take > kindly to slapping their name on made in China products.But, I bet it don't keep it from happening.>The sweet spot for REAL C-size NiCd's is about 3.5AH. I've not found them in the $2 range and would appreciate learning where his came from.
Reply by ●September 21, 20132013-09-21
On 9/17/2013 2:55 PM, miso wrote:> On 9/17/2013 12:26 PM, Andy K wrote: >> I will be replacing eight cells in a battery for a cordless drill. 9.6 V >> >> The markings did not lead anywhere. DF21NF NiCd >> >> Since there are eight cells in the battery, I think they are 1.2 volt >> nicads. >> >> 1 3/4 X 5/8 are the dimensions if that would help with determining the >> mAH. >> >> Could someone help me in what would be a good replacement ? >> >> Thanks. >> > > The capabilities of the charger are more important. Battery capacity > tends to go up as time progresses, but the charge rate is very specific > to each chemistry. Not every battery can be fast charged. You don't want > to charge faster than the cells can handle. If your charger is on the > "dumb" side, it probably just has a timer and puts out a fixed current. > I doubt your replacement cells will be lower capacity than the original > cells, so the cells will be undercharged if the charger is dumb. But the > operating time will not suffer. > > You should have a pack assembled by a battery supplier unless you have > one of those electro-welders handy. You do not want to solder to batteries. > > I have used TNR for nicad packs. They will put the tabs on the ends of > the battery pack and do the cell to cell tab connection. I haven't > checked their website in a while, but I recall they had some standard > battery configurations, i.e. cells in a string with power on opposite > ends, cells snaked around with power on the same side, etc. Or you just > send them a diagram of your physical requirements. > > http://www.tnrbattery.com/ > > Panasonic bought Sanyo, so I don't know if the quality has changed.I have used MTO http://www.mtobattery.com/store/ to put new batteries in my DeWalt packs. I had three repacked about 4 years ago and they still hold a charge fine. They seemed eager to please. No relation to the company, just a happy customer. Mikek
