<div dir="ltr">On Wed, Aug 20, 2008 at 10:31 PM, Robert William Hutton <span dir="ltr"><<a href="mailto:rwh@helms-deep.cable.nu">rwh@helms-deep.cable.nu</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi All,<br>
<br>
In order to use TangoGPS over extended periods, I created myself an<br>
extended battery pack for the Neo FreeRunner from bits and pieces I had<br>
lying around. Check out my blog post for instructions:<br>
<br>
<a href="http://helms-deep.cable.nu/%7Erwh/blog/?p=42" target="_blank">http://helms-deep.cable.nu/~rwh/blog/?p=42</a><br>
</blockquote><div><br>Pretty cool, Rob. Thanks for sharing this. <br></div></div><br>The following are three questions Rob has posted on the above website.<br>- Can we charge the neo at 1000mA from AA batteries without damaging
anything? If so, would it be worth fitting the 47.5 kOhm resistor
between the "ID" and "GND" pins of the USB connector?<br>
- What is the most efficient way to use the external batteries?
Intuitively I suspect it's best to not charge the internal battery from
the external ones as there would be a lot of inefficiency involved.
Perhaps running at 100mA charge rate most of the time, then switching
to 500mA when the neo's battery got low?<br>
- Does anyone know how much current the neo draws when it's set to
(say) 500mA and the battery fills up? It would be a very inefficient
way to use the external batteries and would generate a lot of heat if
it continued to draw more current than it needed.<br><br>-Charles<br></div>