Just long enough for a couple of dozen join ack to be tx’ing then…so that’s ok 
am sure you will be ok… 
Started testing periodic average power consumprion on the TTIG at weekend…its low power suggests good for repackaging as small scale Solar powered install.
USB power meter will not be greatest for accuracy but easy test and gives good order of magnitude for testing/comparing gateways. I obviously don’t see details or spikes in power but have noted that when ‘quiet’ the reading is approx 0.25/0.26A, occasionally peaking at around 0.31/0.32A or 0.35/0.36A suggesting when WiFi or LoRa Tx’ing?
Have 3 TTIGs collocated on bench for testing and another deployed at a local office for range tests…5th going to be registered later today.
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that’s very low… would be a perfect base to build a mobile/4g gateway,
just add a dc-dc converter ( a solar to 5V ?) and a huawei E5573 MiFi Router 
With different 3G/4G Wifi/cellular modem backhaul that’s basically what I have been using at a number of sites with Laird GW’s (previous lowest power average) or RAK831+RPi0W’s (Pilots use 3B/3B+ and therefore too high powered!). With the solar installs most of the Solar Controllers I have been using not only have 12V output but have 1 or 2 USB ports also - so fast/easy build and config! 
Once the TTIGs proven will be adapting a couple for external Ant’s and have already proven will fit nicely in some of my ‘Owl’s’
Just crunching sample range test data and power consumption pictures taken over last couple of days and will post later to the TTIG thread…
bad idea to buy an empty solar power bank enclosure for an outdoor tracker.
not enough room inside and my guess : its NOT waterproof 
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howto store your solar power 
Mine seems running at about 0.13A with spikes at 0.4A… I will check again this afternoon.
Pure coincidence… I sticked that same antenna on a the metal enclosure from an HDMI switch and look,
So the groundplane is very important for the swr
Update to bench testing TTIG power consumption here
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mSATA SSD Storage Expansion Board for Raspberry Pi
bought this 120GB msata - read 520 MB/s, write 320 MB/s
specs
NL shop
These mSATA to USB adapter boards for Raspberry Pi still require a USB cable for it’s IO interface (and power). Although the model shown above has a compact USB to USB (PCB) adapter, many of these solutions require an external USB to USB cable (and €50 is rather expensive for 120GB when compared to below solution).
A regular cheap(er) 2.5" SATA SSD 120GB with USB 2.0 to SATA adapter can be had for around €20 (240GB for around €30). Works just as well. Although you will need to find a solution for mounting the 2.5" SSD. (I have one taped onto a Raspberry Pi enclosure which hangs in the meter cupboard.)
For more compact single enclosure solutions the SSD PCB can be removed from its 2.5" drive enclosure (which will void warranty) and use a PCB-only USB to SATA adapter with a small USB cable.
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no, found it 
but you’re right, it can be done cheaper of course but this HW is for a ‘special’ project
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With solution for mounting I had something different in mind than ‘putting it somewhere on a table’.
LOL
wireless 5.8 Ghz A/V signal captured on Android
‘follow’ me umbrella drones
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22mm AC 60-500V Big Font Display LED Voltmeter 2,06€