Hi folks,

I wondered if someone can clear up some questions I have about running
the E310 on battery power.  I'm aware that I can purchase an E312, but
I'd like to use my existing E310's if possible.

** BACKGROUND **

I'm aware that there's a "newer" (circa 2015, so 3 years old now)
firmware available for the E310 that apparently enables support for
powering the device with a 3.7V battery.  However, installing the
firmware requires opening the device, connecting a JTAG programmer to
the ISP header, and folks in this thread here have reported trouble
finding a compatible connector --
  
http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/2015-October/016085.html
If I can avoid opening the device, hacking a connector on there, etc,
I'd like to.

Meanwhile, some users in these forums report success by just
connecting a 7.2V battery to the device with no mention of a firmware
upgrade, such as this thread --
  
http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/2017-May/024803.html
Yet, Neel at Ettus claims that the E310 (presumably running the
original firmware) needs an external DC power supply, in this thread
here --
  
http://lists.ettus.com/pipermail/usrp-users_lists.ettus.com/2015-May/014048.html

** QUESTIONS **

1. Does one really need to upgrade the E310 firmware to be able to
power the E310 with a battery?  Or is this only necessary if one seeks
to use a 3.7V battery?

2. Can one just connect a (for example) 7.2V battery to the device
without bothering with the firmware upgrade?  Maybe with a voltage
regulator if necessary and a plug that's compatible with the E310
power jack on the end (such as the KLDX-PA-0202-A-LT that is suggested
in yet another thread on these forums).

Thanks.
Andy

--
https://aspect.engd.wwu.edu

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