>>Hi Terry
>>
>>>That's interesting, given that I've often read that it's advisable to let rechargable batteries run down completely occasionally/often, to prolong their efficacy ???
>>
>>So did I understand too. Time we start not to let it run down.
>
>From my electronics engineering days, I can recall that there are many types of rechargeable batteries each with some difference. A few rechargeable batteries can be “deep discharged”, such as Gel Cells, while most Nicads should be run down near the point of discharge.
>
>Gel Cells recover from total discharge while Nicads do not. Nicads (some types) have a memory and can only be charged/discharged to a specific point dependant upon use. That is if your have a battery that should last for two hours and you use it for one hour and then recharge it then you will only have one hour total use from that battery.
>
>I am sure that there are many new types of batteries on the market that I have not researched. In is best to use manufacturers recommendations.

I wonder how to tell if we are reading "manufacturer's recommendations" or "marketing recommendations"? My suspicion is that the two are likely very different in most instances.