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Re: [Healeys] off topic rechargeable battery query

To: healeys@autox.team.net
Subject: Re: [Healeys] off topic rechargeable battery query
From: Bob Spidell <bspidell@comcast.net>
Date: Thu, 04 Jun 2015 07:37:26 -0700
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
References: <013201d09ecf$393d6c50$abb844f0$@lachlan@homecall.co.uk> s=q20140121; t=1433428643; bh=wSIu1k7R/uXIFBndxF0S0CCazsyZiyXTlbzdtp26+v4=; h=Received:Received:Message-ID:Date:From:MIME-Version:To:Subject: Content-Type; b=OoC3cOwyeSbt5/U50/f/VsDIgzqsugd88rPpdXHj7TXuCvfMaasmiZfBLs3LFa05X P4Dqejcti5eGzk30Il3CFhfjGHldxmb7FZfUYpDn2Hx5lx5VNr4Ub4JUsz2mHxhsC3 A7rShssBQ6S2JFPQjV5dPtt0OJVza2QAI5Jke8LDOj36xoUanWHKkDKgO0azaPk70E PfGASzPKm9y7h92yoBYV8Qwfs01FvRMMv33HH7AMtZBV/funiA2pLZh8d15xzCuuJj KxYlXLoeN+l75ODfi98E6mHsAM98VmILMZEIlgcRYoMXvWbE0WxwShyq5Yt2lcInOm eXa0KnzgPLBZg==
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The mAH is a rating of how much current the battery can supply for how long:

'milli Amp Hour'

Get the highest rated you can find/afford; though the rating on the 
Chinese knock-offs--I think most of them are--seems to be overstated.  
The load--how much current will be used--is determined by the circuit on 
the phone.

The statement on the charger makes no sense; applying 6V to a 1.5V 
battery would cook it in short order (putting 48V on a car battery would 
boil the electrolyte; creating a major mess and possibly an explosion).  
I suspect it's a nominal rating; i.e. it will put out 150mAH at 6v, but 
only needs about, oh, 2V or less to charge the batteries and would 
supply 450mAH at that voltage.

E (voltage) = I (current) * R (resistance).  Plug in any 2 known 
values--and use a little algebra if necessary--and you'll get the third.

Bob



On 6/4/2015 7:03 AM, Simon Lachlan wrote:
>
> The string on 1.5v recharging demonstrated that some of you gurus are 
> multitalented(sp?). So............
>
> The batteries in our domestic cordless phones are giving up.
>
> They are AAA Nickel Metal Hydride 550mAh.
>
> Looking on eBay, most similar rechargeable AAA phone batteries are 
> around 1500mAh. Nothing less than 700mAh.
>
> Can I stick in the highest rated that I can find, 1800mAh, and expect 
> good results? Or does the higher mAh level imply some level of 
> something that the phones? chargers won?t manage???
>
> (The charger says ?Output: 6v. 150mAh?)
>
> Simon
>
>


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    The mAH is a rating of how much current the battery can supply for
    how long:<br>
    <br>
    'milli Amp Hour'<br>
    <br>
    Get the highest rated you can find/afford; though the rating on the
    Chinese knock-offs--I think most of them are--seems to be
    overstated.  The load--how much current will be used--is determined
    by the circuit on the phone.<br>
    <br>
    The statement on the charger makes no sense; applying 6V to a 1.5V
    battery would cook it in short order (putting 48V on a car battery
    would boil the electrolyte; creating a major mess and possibly an
    explosion).  I suspect it's a nominal rating; i.e. it will put out
    150mAH at 6v, but only needs about, oh, 2V or less to charge the
    batteries and would supply 450mAH at that voltage.<br>
    <br>
    E (voltage) = I (current) * R (resistance).  Plug in any 2 known
    values--and use a little algebra if necessary--and you'll get the
    third.<br>
    <br>
    Bob<br>
    <br>
    <br>
    <br>
    <div class="moz-cite-prefix">On 6/4/2015 7:03 AM, Simon Lachlan
      wrote:<br>
    </div>
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        <p class="MsoNormal">The string on 1.5v recharging demonstrated
          that some of you gurus are multitalented(sp?). 
So............<o:p></o:p></p>
        <p class="MsoNormal">The batteries in our domestic cordless
          phones are giving up.<o:p></o:p></p>
        <p class="MsoNormal">They are AAA Nickel Metal Hydride 
550mAh.<o:p></o:p></p>
        <p class="MsoNormal">Looking on eBay, most similar rechargeable
          AAA phone batteries are around 1500mAh. Nothing less than
          700mAh.<o:p></o:p></p>
        <p class="MsoNormal">Can I stick in the highest rated that I can
          find, 1800mAh, and expect good results? Or does the higher mAh
          level imply some level of something that the phones? chargers
          won?t manage???<o:p></o:p></p>
        <p class="MsoNormal">(The charger says ?Output: 6v. 
150mAh?)<o:p></o:p></p>
        <p class="MsoNormal">Simon<o:p></o:p></p>
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