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Author Topic: 10,400mAh Power Bank - with 5V : 9V : 12V via USB - $18.99  (Read 809 times)

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Offline FOB_Taper

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https://www.monoprice.com/product?p_id=15124&cl=res&utm_source=170730_email&utm_medium=email&utm_content=15124&utm_campaign=170730_sunday

These are high quality batteries under $20. They have higher mAh ones, but those all run ONLY at 5V. I want to power my V2 and V3.

Does anyone know where I can get a USB > V2 cable running 12V?




Offline willndmb

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Offline Hypnocracy

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Re: 10,400mAh Power Bank - with 5V : 9V : 12V via USB - $18.99
« Reply #2 on: July 31, 2017, 10:44:47 AM »
At one time I was running a V2 and Aerco MP2>DR680 and wanted to simplify my batteries from three to one MaxOak K2 185wh Li-Ion with multiple outputs 20v-12v (2)2a USB and (2)1a USB outputs. I actually purchased on Amazon a USB to 12v & a second USB to 9v converter cable. I ran the DR680 off of the USB to 12v cable an there was no audible artifacts. In the end I never got around to making the cable connections to the preamps and purchased my dream all in one recorder and dropped it...

Cable USB>12v (9v version is on same link)
https://www.amazon.com/LANMU-Module-Converter-Barrel-Connector/dp/B01G3ERI6U/ref=sr_1_1?ie=UTF8&qid=1501511561&sr=8-1&keywords=USB+to+12v+cable

MaxOak 185wh with 20v-12v & 4 USB outputs
https://www.amazon.com/Laptops-External-50000mAh-Portable-Notebook/dp/B073R6NKLW/ref=sr_1_2?s=electronics&ie=UTF8&qid=1501511735&sr=1-2&keywords=maxoak+k2

Ted makes cables but not sure he makes USB Power converter cables...he said if I shipped the USB to 12v/9v converter cables that he would change over the output connectors for the V2 and Aerco, but, this is definitely nothing on his price list and priced as required basis.

The stock USB >12v/9v cables are here...you want them? I'd love to see this happen. 
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Offline rumbleseat

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Re: 10,400mAh Power Bank - with 5V : 9V : 12V via USB - $18.99
« Reply #3 on: August 07, 2017, 11:05:51 AM »
Beware the mAh rating!

That looks like a fine battery pack, but there's some uncertainty in knowing exactly how much power it will deliver since they don't specify the voltage for the milliamp hour rating.  My guess is that they're using 3.7 volts as the reference since that's the standard voltage of a lithium ion cell.  Given that, the 10,400 mAh pack could deliver about 38.5 watt hours (10.4 x 3.7 = 38.5).  For under $20, that seems like a fair price.

That MaxOak battery for $130, mentioned by Hypnocracy, puts out a hefty 185 WH.  This unit can't go on an airplane since it's over the 160 WH FAA limit.

If you want something in-between and/or need to fly with it, several TS members have purchased the TalentCell batteries from Amazon:
https://www.amazon.com/TalentCell-Rechargeable-11000mAh-14500mAh-26400mAh/dp/B01337QXMA

The TalentCell "12V/8300mAh" model for $50 puts out 100 WH an is OK for air travel since it is under 101 WH.  The larger "12V/11000mAh" model for $65 puts out 120 WH and needs airline approval to fly since it is in the 101-160 WH range.  Both units can output 5V, 9V, and 12V simultaneously.

The weight of the battery packs tells the same story:  The Monoprice 10,400 mAhr (38.5 WH) weighs 9.1 oz, TalentCell 12V/8300mAh (100 WH) is 24 oz, and the MaxOak 185WH is 45 oz.

Hope that this is helpful in sorting out the mAh confusion in the marketplace.
« Last Edit: August 07, 2017, 11:23:59 AM by rumbleseat »
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