Re: MD: Additional battery
Hi guys, I'm not familiar with the Sony R37 so dunno how it's battery gauge is calibrated but the gauge on the R3 seems to work well with both alkalines and nicad or nimh rechargeables. Whilst I haven't actually monitored the exact voltage range associated with each of the four battery levels, I guess the internal resistance of alkalines makes them behave rather similar to rechargeables in it. A current drain of say 300mA is gonna cause a voltage drop from a set of alkaline cells so their 1.5V nominal voltage may become 1.3V under load. The same drain from Nicads will have negligible effect on their voltage due to their very low internal-resistance. I guess the same will apply to NiMH cells but I am not certain. Nicads will certainly hold a fairly constant voltage for most of their life but it does fall slowly and probably in a similar range to the voltage presented by alkalines (when under load). I can also say my R3's battery indicator works fine with a couple of 1300mAh NiMH AA cells though as it was designed to take either Alkalines, or the BP-DM20 NiMH pak I wonder if perhaps it auto-detects rechargeables (inc Nicad) and adjusts the gauge accordingly. I have a number of things that say "don't use rechargeable batteries" in the booklet. I can honestly say I have never used my nicads in any of the manuals, but have never had any problems using them in the gadgets in question :-) The only thing I would say you shouldn't use rechargeable batteries in are electronic kits, where you wire up a circuit yourself. Nicads have a *very* low internal resistance and if you accidently wire up a short circuit, things will go seriously pants when you apply the power :-P Cheers, PrinceGaz -- "if it harms none, do what you will" Email: [EMAIL PROTECTED] Website: http://website.lineone.net/~princegaz/ ICQ: 36892193 Earn a minimum of $20 per hour by watching ads on the net! Visit http://www.bepaid.com/users.rhtml?REFID=10164669 - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: Additional battery
=== The original message was multipart MIME=== === All non-text parts (attachments) have been removed === OK... Whatever u say. My site is: (Being fixed, expect it up by 2000/02/01) For something cool, go to this site: http://www.geocities.com/Tokyo/Fountain/1845/Pager.html. After "paging" me there, click the third button that you see there in the lower right-hand corner. My MP3 player giveaway is taking place (for USA residents only!!!) right now at: http://geocities.yahoo.com/gokon_89/Form.html If you are in USA, you can VoiceMail me at +1-877-215-3555, EXT. 8814...--- Get your (!) ___***FREE***___ (!) voicemail service at http://www.mytalk.com/ Want to see the time in most of the time zones at once? Go here: http://www.geocities.com/Tokyo/Fountain/1845/World_Clock.html === MIME part removed : Message/RFC822 === - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: Additional Battery
Hi Yaniv, If it is just one cell that you use, then a standard AA alkaline battery, say Duracell, will have a rated voltage of 1.5 V, and rated capacity of 2,700 mAh, and a 5 year shelf life. The maximum open circuit voltage is normally 1.56V, and the recommended end voltage is 0.8V. It will operate efficiently at high or low discharge rates If you use an equivalent AA sized Ni-Cad rechargeable battery, (say a Sanyo Cadnica High Capacity, one of the better brands) then the rated voltage will be 1.2V, and the capacity is likely to be 1200mAh. If you want to successfully recharge it, then you should not allow the end voltage to fall below 1V. The open circuit voltage will depend on temperature, and the time since last charged. NiMH rechargeables for AA, will be 1.2V, with a slightly higher capacity (compared with a Ni-Cad) of 1500mAh. You will not damage the Sharp MD (or any other MD) if you substitute a rechargeable cell for the alkaline cell, but you may well find that the unit does not work, because the voltage is too low, or it does not work for very long, due to the reduced battery capacity, or it works in play mode but not in record ,say, due to the inabilty of the rechargeable cell to deliver a high rate of disharge. The Sharp handbook on the MT161 is also completely wrong about batteries. Best wishes, Ray (other battery stuff on http://www.rwc.cwc.net) Date: Fri, 21 Jan 2000 12:47:42 -0500 From: "Yaniv" [EMAIL PROTECTED] Subject: MD: Additional battery I just got a sharp 722. The instructions say that you can only use an alkaline battery in the reserve battery attachment. Why is this? Will it really cause problem if I use rechargeable AA? - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
MD: Additional battery
I just got a sharp 722. The instructions say that you can only use an alkaline battery in the reserve battery attachment. Why is this? Will it really cause problem if I use rechargeable AA? - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: Additional battery
* "Yaniv" [EMAIL PROTECTED] on Fri, 21 Jan 2000 | I just got a sharp 722. The instructions say that you can only use an | alkaline battery in the reserve battery attachment. Why is this? Will it | really cause problem if I use rechargeable AA? Maybe. Rechargeable batteries, even the alkaline kind, tend to provide a very steady current, and then drop off sharply when they are almost fully discharged. Alkaline batteries have a steady but gradual decrease in voltage. The curves look something like this: rechargeable: -\ | | \ | | Alkaline: \ \ \ \ \ \ The slopes are too steep, but that's life in ASCII :). Anyway, most electronic devices that have power level sensors are calibrated to the power curve of alkaline batteries. If you put something else in such a device, it could fail without warning. Also, rechargeable batteries are not good for high instantaneous loads. Trying to deliver power under such requirements can cause physical damage to the batteries. -- Rat [EMAIL PROTECTED]\ When not in use, Happy Fun Ball should be Minion of Nathan - Nathan says Hi! \ returned to its special container and PGP Key: at a key server near you! \ kept under refrigeration. - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
Re: MD: Additional battery
=== The original message was multipart MIME=== === All non-text parts (attachments) have been removed === I have rechargeable batteries of the NI-CD type and I don't see what you're talkin' about. Thier power goes down as gradual as the regular alkaline... My site is: (Being fixed, expect it up by 2000/02/01) For something cool, go to this site: http://www.geocities.com/Tokyo/Fountain/1845/Pager.html. After "paging" me there, click the third button that you see there in the lower right-hand corner. My MP3 player giveaway is taking place (for USA residents only!!!) right now at: http://geocities.yahoo.com/gokon_89/Form.html If you are in USA, you can VoiceMail me at +1-877-215-3555, EXT. 8814...--- Get your (!) ___***FREE***___ (!) voicemail service at http://www.mytalk.com/ Want to see the time in most of the time zones at once? Go here: http://www.geocities.com/Tokyo/Fountain/1845/World_Clock.html === MIME part removed : Message/RFC822 === - To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
