Subj : Nimh Batteries To : Barry Martin From : Ed Vance Date : Sun Jan 12 2025 18:48:14 > Hi Ed! > I'm not sure how to do a search either - probably depends on the system > so won't go in to it. > As for the use of rechargeable batteries, a bunch of details which > prevent a yes or no answer. Main on is voltage. Alkaline batteries > (the single-use ones, though they can be recharged to a point) output > 1.5 vDC (volts direct current), so the camera or other powered device > expects to see that. The original NiCad rechargeable batteries > outputted approximately 1.2 vDC. That third of a volt difference made > the rechargeable battery look like it was already partially discharged > to some devices. Your old flashlight with the filament bulb would > appear slightly dimmer. > When a device uses multiple batteries that third of a volt starts > adding up. Remember (maybe not! ) the warning to not use > rechargeable 9v batteries in smoke detectors? A 9v battery is six 1.5v > cells: 1.5v x 6 = 9.0v. Use a rechargeable: 1.2v x 6 = 7.2v. The > smoke detector would still work, just wouldn't take too long before > CHIRP! > Back to the 'regular' devices, it is possible to build circuits which > only require 1.2 volts (or even less). Can use a voltage regulator > circuit which would 'shave off' the 'extra' volts: output 1.2v > regardless of 1.5v in, 1.2v in, or in between. That added circuit costs > money, of course, and companies want their profit! > Recently there are Lithium-based batteries which are rechargeable and > output the full 1.5v constantly, until the end where they need > recharging. Alkalines taper off as they discharge, which is why your > flashlight was bright with new batteries and gradually dim. The > constant output voltage withe the Lithiums is nice; bad news is their > current output isn't quite as much as other types of batteries, so > running a motor might not be as efficient (I haven't tried). > And yes, I did pretty much skip over your question on NiMH batteries: I > barely have any experience with them. The 'general rules' apply, just > there is a special sub-section for their composition. > Another tangent is the recharging of the various types of batteries. > all I really know is there a special types of rechargers fopr the > various types of batteries because they have their own rules on how > fast, etc. So don't mix! ...The Lithium batteries I have can be > recharged from a USB port: USB-A to USB-c cable -- the regulatory > circuit is inside the battery. (They are not rechargeable when in the > device and plug a recharging cable in the device.) > And now I'll learn from others' replies! > > < > > BarryMartin3@MyMetronet.NET < > > < > ... I sympathize with batteries: I never get included in anything either. > --- MultiMail/Win32 v0.47 > * wcECHO 4.2 = ILink: The Safe BBS * Bettendorf, IA > --- QScan/PCB v1.20a / 01-0462 > * Origin: ILink: CFBBS | cfbbs.no-ip.com (454:1/1) I wrote a reply but don't think it got Saved. Here goes again. Thanks for the info about Your Lithium Cells having circuitry in them for recharging. Ni-Cads - I bought a 5 cell Flashlight at Radio Shack long ago. Went to a Electronics Wholeseller and got Ni-Cad batteries for it and a recharging box too. I don't think I got a years service out of those batteries. I learned previously that a Ni-Cad Battery had to be run flat before recharging it BECAUSE a early recharge would give IT a memory where it didn't give as long of a life anymore. I am going to read up all I can before getting the Ni-Mh AA cells for the camera here Will even look at what is on Wikipedia. Anyone have a suggestion for a webpage will be appreciated. I usually don't get in a rush to buy things. For example - in the 1970's I wanted to buy a 35MM Film camera which had interchangeable lens. Sears Catalog section had a Camera Catalog with detailed specifications for the cameras in that book. To make my selection I used an ink pen to mark over features I didn't want in a camera. Such as: Aperture Priority vs. Shutter Priority. YES! I AM THAT PICKEY! I decided the Olympus OM-10 would suit me. And it did until Digital Cameras came out. Ed --- SBBSecho 3.20-Linux * Origin: ILink: CCO - capitolcityonline.net (454:3/105) .