[AZ-Observing] Re: Recharging
- From: Stan Gorodenski <stanlep@xxxxxxxxxxxxx>
- To: az-observing@xxxxxxxxxxxxx
- Date: Tue, 17 Mar 2015 10:39:33 -0700
Tim,
Good info to know. Thanks.
Stan
On 3/17/2015 10:34 AM, Tim Jones wrote:
> In reality, the best rule of thumb is to assume 1/4 the time listed by the
> manufacturer since the laptop will only see times like they advertise if
> you’re doing simple tasks like watching a video, browsing the web, working in
> Word where the CPU is able to throttle down, the memory clock is slowed to a
> crawl, and you’re apps only use the low-end graphics chipset. If you’re
> running an astronomy app or database-based app, the level of disk I/O and
> graphics use will draw that number down to around 3.5hours.
>
> My fully loaded Mac Book Pro Retina (i7, 3.2GHz), is claimed to have a 8 hour
> battery life. In reality, I’m lucky to get 2 hours because of the way that I
> use it.
>
> Tim
>
>
>> On Mar 17, 2015, at 8:51 AM, Stan Gorodenski<stanlep@xxxxxxxxxxxxx> wrote:
>>
>> p.s., If this really does get up to 12.8 hours on a charge, you might
>> wonder what my concern is. I think I mentioned I will be out in the
>> field for an extended period of time, about 2 weeks at a time.
>> Stan
>>
>> On 3/17/2015 8:45 AM, Stan Gorodenski wrote:
>>
>>> Dwight,
>>> You are correct about not needing a super computer to do astronomy in
>>> the field. I bought this for other reasons besides astronomy. Although I
>>> have never tried seeing how long it will run on the battery alone, the
>>> ad in B&H when I bought it says it has "9-Cell Lithium-ion providing up
>>> to 12.8 hours per charge (94Wh)", whatever 94Wh means. The battery is
>>> sort of an odd design. It sticks out about an inch beyond the laptop, I
>>> guess to fit in all the 9 lithium cells.
>>> Stan
>>>
>>>
>>>
>>>
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