Kai Posted September 12, 2014 Report Share Posted September 12, 2014 I saw this high capacity external power bank on eBay recently, it has a has 9~20v / max 4.5a output, has anyone tried to use a power bank to power up your equipments? I'm curious to see how it perform? http://www.ebay.com/itm/Poweradd-32000mAh-Portable-Battery-Power-Bank-for-Tablet-Laptop-Acer-HP-Dell-/271256892107 Quote Link to comment Share on other sites More sharing options...
jacefivesound Posted September 12, 2014 Report Share Posted September 12, 2014 3.2 amp hours? Wouldn't power gear for very long. Plus there aren't any pro dc connections that I can see.... Quote Link to comment Share on other sites More sharing options...
Rick Reineke Posted September 12, 2014 Report Share Posted September 12, 2014 According to the eBay seller. Capacity= 32,000mAh/118.4Wh. 118.4Wh ain't bad. But I'd be skeptical. And @ 840 grams, most Lithium-ion NP1's would be lighter.. is also a Lithium-Polymer which usually doesn't have nearly as many charge/discharge cycles as a Lithium-Ion. Quote Link to comment Share on other sites More sharing options...
Glen Trew Posted September 12, 2014 Report Share Posted September 12, 2014 32000mA/hr = 32A/hr, which is meaningless without knowing the voltage. But if the W/hr rating is 118.4W/hr, the A/hr rating is calculated with a supply voltage of 3.7 volts, which is useless for the equipment most of us use. Something is amiss. Maybe the specs of two different power supplies are being compared. But it's a good example of how the Amp/hour rating is no good by itself, and for what most of us on this group do, should go the way of the V(irtually) U(seless) meter. The Watt/hour spec gives the true capacity of a battery, which explains the current tension. Who doesn't like P=IE? Quote Link to comment Share on other sites More sharing options...
studiomprd Posted September 12, 2014 Report Share Posted September 12, 2014 Glen: " 32000mA/hr = 32A/hr, which is meaningless without knowing the voltage. " yes, but 32A/hr for a cell phone that runs at (or near) the voltage of that supply would be a lot... the issue really is that the unit in question is not really suitable to begin with. Quote Link to comment Share on other sites More sharing options...
John Blankenship Posted September 12, 2014 Report Share Posted September 12, 2014 ...go the way of the V(irtually) U(seless) meter. ... Real VU meters had (and sometimes still do have) value when used for their intended purpose. Unfortunately, they have been improperly used all too often, and the majority of meters labeled VU, do not have the appropriate ballistics to be true VU meters. Quote Link to comment Share on other sites More sharing options...
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