[Elecraft] KX3 Rechargeable Batteries

[K9MA]

I think Bob is mainly referring to NiMH batteries. I am not sure about 
the partial discharges, and whether each one counts as a whole cycle. 
That is certainly NOT true of lead-acid and Li-Ion batteries, which will 
survive many more partial discharges than deep ones. Li-Ion batteries 
should not be stored for long periods fully charged, but at 50-70 
percent. Fortunately, their self-discharge rate is so low that you would 
have to store them for years before you would have to worry about them 
becoming completely discharged, which is bad for all types.

73,
Scott K9MA

On 12/28/2018 10:41, Bob McGraw K4TAX wrote:
> Something I learned from one of our "tech reps" regarding rechargeable 
> batteries and charge cycles.    I have successfully applied his advice 
> for a multitude of and different types of my rechargeable batteries.
>
> If you use a battery and then recharge it, that is one charge cycle.   
> Likewise if you should use only 10% of the battery capacity and 
> recharge it, that is also one  charge cycle.   And in the same vein, 
> if you use 90% of battery capacity and then recharge it, that is also 
> one recharge cycle.
>
> The point, every time you use the battery, regardless of the amount of 
> discharge, and recharge it, that is one charge cycle. In other words, 
> don't recharge until necessary.   And never leave a battery in the 
> discharged state.  Always charge to full capacity.   Short charging 
> cycles, because one perhaps is in a hurry and can't wait, only 
> subtracts from the total number of charge cycles available.    And 
> there are only so many charge cycles with each type of battery.   So 
> every time you use and recharge a battery, click off one charge cycle.
>
> I've practiced this with several different types of batteries and find 
> that my batteries last much longer and need less frequent replacement.
>
> 73
>
> Bob, K4TAX
>
>
> On 12/28/2018 9:47 AM, Walter Underwood wrote:
>> Eneloop Pro (labeled Eneloop XX for a bit) are rated for 500 charge 
>> cycles. Regular Eneloop batteries are rated for 2100 charge cycles 
>> but have lower capacity. Choose the one you prefer. I like the higher 
>> capacity batteries.
>>
>> The Wikipedia page on Eneloop has a chart that clears this up to some 
>> degree.
>>
>> https://en.wikipedia.org/wiki/Eneloop
>>
>> wunder
>> K6WRU
>> Walter Underwood
>> CM87wj
>> http://observer.wunderwood.org/ (my blog)
>>
>
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-- 
Scott  K9MA

k9ma at sdellington.us