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Old 05-15-2013, 07:05 PM
LADave LADave is offline
Junior Member
Join Date: May 2013
Location: greater Los Angeles
Posts: 4
Default Auxilliary battery

I want to replace my e250's internal battery with a higher capacity external pack consisting of at least three NiMH C cells, which should give me about 5,000 MAH and 168 hours of uptime.

I want this setup for community noise data collection where I will log decibels at 1/8 second intervals. I will also record PCM clips of high-noise incidents. I will need to create a RockBox variant for this. I will want to run this application for 24 hours up to a full week unattended.

Should I remove the existing battery? Seems like if I leave it in place, the auxilliary pack will be pushing current through trying to charge it, wasting precious capacity.

Can I even remove the existing battery and then attach the external setup through the USB/dock connection? And if I do this, will I need to use four cells instead of three to bring volts up close to the 5v USB standard?
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