[Healeys] off topic rechargeable battery query

[Bob Spidell]

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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