[Elecraft] Batteries, batteries, batteries

[David Gilbert]

If they have solderable tabs they are most likely indeed rechargeable.   
I can't think of very many applications for single-use alkalines with 
solderable tabs.

To check them out, the best bet would be to try to charge them with a 
small DC supply and a current limiting resistor to hold the current to 
maybe 50 ma, and then see how they hold up under a similar load like a 
flashlight bulb.  Nicads can degrade even with lack of use so don't be 
surprised if the results are disappointing unless the batteries are 
relatively new.

Dave  AB7E



On 4/5/2011 12:58 PM, R. Kevin Stover wrote:
> On Tue, 05 Apr 2011 12:36:13 -0700
> Vic K2VCO<vic at rakefet.com>  wrote:
>
>> My brother-in-law just gave me a large box containing literally
>> hundreds of what he says are recharageable batteries. That is all he
>> knows about them. They are in sets of three in series, AAA size, with
>> solderable tabs. I suspect they are nicads, but don't know. NOTHING
>> is written on them. They are green, for all that means.
>>
>> Can anyone guess what they might be or suggest a way to find out?
>> Could I put them in series/parallel to make a battery pack for my K2?
>> Does anyone want some?
>>
>> Or should I be looking for a way to dispose of them (I'm sure they
>> count as hazardous waste)?
> AAA Ni-Cad cells have a nominal voltage of 1.25V same as Lithium.
> Alkaline have a 1.5 volt nominal voltage.
>
> I'd say if the three cell packs have a of 4.0 or better they are
> Alkaline.
>