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Sci.Electronics.Basics
Sci.Electronics.Basics is a worldwide Usenet news group for discussion of electronics where there is no such thing as a stupid question. Beginners questions. Discussion of electronics education. Requests for other sources of information.

We found 45 threads matching "nimh"
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We found 45 threads matching "nimh".

Nimh batteries
Eder - 15:31 08-02-07
I have bought some AA Nimh batteries and find that they are vary slightly bigger than standard alkalines. I'm talking about a millimetre or two and not much more, but it's enough... Read More
Re: Looking for rechargeable 9v battery recommendation tia sal2
redbelly - 16:20 30-08-06
temp@temp.com wrote: > Greets All > > I'm going to be traveling and have a small device that needs to run 3 hours > on a 9v battery everyday. I'm looking for a good/great ... Read More
NiMH 1.2V charger
13:29 29-12-06
I'm looking for a good design (with schematic) to charge single 1.2V NiMH batteries. Not two in series, not three or four in series: individual batteries. Schematics of char... Read More
Can I replace NiCad with NiMH?
Mitch - 11:49 28-03-07
I have some rechargable wireless headphones that I use on the treadmill. The NiCads have developed so much memory that they only last about 1/2 hour. Can I replace them with ... Read More
Re: How hot should NiMH's get in the charger
torbjorn.ekstrom - 12:22 23-07-07
Jasen Betts wrote: > On 2007-07-22, Bearded Occam wrote: > > > New subscriber here. > > > > I have a set of Sony AA size NiMH's that are the original batteries > > w... Read More
Re: "Simple" hour/minute binary clock?
Jeff Findley - 08:43 20-10-06
wrote in message news:1161346654.772369.59030@m7g2000cwm.googlegroups.com... > > Battery voltage doesn't matter, whatever will drive the circuit. I'd > prefer to not ... Read More
Re: Battery for Winbook XLI Laptop
John - 14:43 02-10-06
On Mon, 02 Oct 2006 17:26:42 GMT, "W. Watson" wrote: > I contacted a battery store in Palo Alto about the battery for an Xli, and > they said they no longer carry them, sin... Read More
Two battery related questions ...
purple_stars - 23:09 12-12-06
Hi folks, I use a bank of NiMH batteries to power some mobile equipment and I currently charge the bank with a small 6.5 watt folding solar panel. Works great. One nice extra... Read More
Rechargable battery power
Rod@Hillhead - 16:43 17-01-07
Hi, I have connected 5 new NiMh batteries in series, each is rated at 3800 mAH. When I connect a 10W, 6v halogen bulb to them it lasts about 2 hrs. I expected longer than this... Read More
# of batteries to cause polarity reversal
03:55 16-01-07
If I have two NiMH batteries in series under a load, and one is weaker than the other, is it possible for the stronger one to force the weaker one to reverse polarity? ... Read More
Battery Charger Temperature Cutoff
Joe - 21:45 22-07-07
I built a NiMH charger based on the Maxim 712 chip some time ago. I didn't implement the temperature cutoff part of the chip's capability, and now would like to do that. Her... Read More
Help me build a bicycle phone charger
BikePilgrim - 19:36 07-01-08
Hello, I recently built-up a front wheel for my bicycle that has a 6v/ 3.5w dynamo. These are designed to power headlamps, but I'd prefer to store the electricity in a battery wh... Read More
NiMH power weight ratio
22:31 08-01-07
Just wondering if anyone knows the weight of these batteries? AAA 900mAH AA 2500mAH or will they vary between manufacturers? I'm trying to work out whether 4 x AAA or 2 x... Read More
Re: Powering Rope Light With Batteries?
Eeyore - 15:22 18-11-06
j.rumao@gmail.com wrote: > Well, I was hoping to use anywhere from AA's to D's if possible, and > work a switch in there as well. Radioshack sells boxes that can hold > ... Read More
Re: Solar-recharging garden lights - rewire to mains?
JakeD - 12:10 25-12-07
Just for the record - in case it is of any interest, I connected all 12 lights in parallel, and used just one of the solar-panelled battery boxes, which I fitted with three ful... Read More
14.4 Volt 30AH Lithium-ion Batteries
Scott - 07:05 29-04-07
High Capacity Batteries AH Lithium, NICD, NiMH, NiFE Batteries for sale Up tp 1220 AH NiFE calls 14.4 Volt 30AH Lithium-ion Batteries 1000+ Cycles With Protective circuitry Spe... Read More
ATTiny13 voltage and current ratings
04:10 03-07-07
I was reading the datasheet on my ATTiny13, and noticed the following ABSOLUTE MAXIMUM ratings: Maximum Operating Voltage 6.0V DC Current Vcc and GND pins: 200 mA I was pl... Read More
Alkaline and rechargeable batteries and devices
kimiraikkonen - 11:07 07-11-07
Hi, I heard something but i want to make sure that i experienced that: If i use non-alkaline rechargeable batteries (i have GP ones, 1.2V NiMH) on a mp3 player, after sometime... Read More
Re: Can anyone recommend a good AVR book...
linnix - 13:57 27-09-06
> 2) Let's say I want to make a simple AA battery tester (0 to 1.5 VDC > range), and interface it to the PC via serial port. I know I'll need > an ADC, and I can probably ... Read More
Re: AA batteries in AAA slot?
Doug Miller - 22:02 20-06-07
In article , phantom wrote: > (I had rechargeable AAA and AA alkaline batteries once. They worked, > but ended up a disappointment. Some leaked, and they permanantly lost ... Read More
Re: can a charger bought for 2100mAh used for 2500 or 2700 mAh?
12:02 18-02-08
On Feb 16, 6:54=A0pm, interuser wrote: > Hi. > I have a sony cybershot photo camera that came with 2100mAh > rechargeable sony AA batteries and their charger. > Now... Read More
Re: Zener Diodes / Voltage Regulation
Charlie Siegrist - 16:27 22-07-07
On Sat, 21 Jul 2007 22:01:28 -0700, in message , FyberOptic scribed: > The basics of diodes has always been "current can only flow one way", That's a bad assumption, a... Read More
Re: Long term storage of camera batteries
thomas - 08:37 08-05-07
"Grey" wrote in message news:H6SdnY077O9MfKPbnZ2dnUVZ8sylnZ2d@bt.com... > My camera uses AA size 1.25v nickel metal hydride batteries and I've just > had a set die on m... Read More
Battery suggestion for handheld unit?
Joseph - 12:44 27-02-07
I'm making a handheld unit and the enclosure that was dictated to me does not have a battery compartment door on it...so I have to use internal rechargables. my. The unit will ... Read More
Rubbish camera batteries
Periproct - 17:05 26-03-07
My proprietary camera batteries don't last long when new and as I'm not a photography enthusiast I find, when the camera does come out, the batteries have discharged to the poi... Read More
Lithium Battery for Pogo Radio YourWay?
W. Watson - 12:51 29-11-06
I just called the mfger (Pogo), and they want $20 for the battery, sales tax, and $8.00 for shipping from S. Calif. to here in N. Calif. I'm not happy about the shipping costs ... Read More
Re: Substituting alkaline for ni-mh in Digital Camera
19:11 20-12-07
On Dec 20, 9:30 am, twirling.h...@gmail.com wrote: > My camera normally takes a 6v .6ah ni-mh battery. I've been able to > rig-up and power the camera from a 5v 1.5a wall wart... Read More
AA Battery capacity tester- resistor & clock
Jim Elbrecht - 09:11 27-07-07
I've got a couple dozen Nimh batteries that are starting to show signs of age. [some are 7yr old 800mAh, the newest are 2000 mAh & 3-4 yrs old] I googled for capacity testers... Read More
Re: New Lithium Ion Battery technology...any good?
Tim Auton - 11:24 03-09-06
Gerald wrote: > On Sat, 2 Sep 2006 14:49:55 +0100, tim.auton@uton.groupSexWithoutTheY > (Tim Auton) wrote: > > > Define 'better'. > > LOL! If it is not a clearly ... Read More
Re: Why does a matchbook sized cell phone battery require 3 hours to charge
JR North - 21:51 02-07-07
My 2600 MAH AA Nimh cells fast charge in 3 hours, and get moderately warm doing so. As others have pointed out, heat dissipation is the key. JR Dweller in the cellar Ignoram... Read More
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