RobertH Posted July 9, 2012 Report Share Posted July 9, 2012 I have a question about charging items using a Powered USB hub. I got a powered 7 port USB hub when I was in China and I use it for charging my speakers I take to the swap meet. My question is do you think if I am charging 7 at once the USB power on the hub could drop so it is not charging the speakers fully or it will take a longer time to charge them? The Specs on the hubs power supply are INPUT 100-240V-50/60Hz 0.60a OUTPUT: 5V-2000mA ÜÓ Link to comment Share on other sites More sharing options...
cjr818 Posted July 9, 2012 Report Share Posted July 9, 2012 The figures show you can charge three at those power requirements without increasing the charge time. Link to comment Share on other sites More sharing options...
Randy W Posted July 9, 2012 Report Share Posted July 9, 2012 The figures show you can charge three at those power requirements without increasing the charge time. Gotta question this - wouldn't you need to know the current requirements for the charging? The specs he gave are for the hub only. Link to comment Share on other sites More sharing options...
DennisLeiqin Posted July 9, 2012 Report Share Posted July 9, 2012 The figures show you can charge three at those power requirements without increasing the charge time. Gotta question this - wouldn't you need to know the current requirements for the charging? The specs he gave are for the hub only.The charger OUTPUT: 5V-2000mA So, yes, what is he charging? Link to comment Share on other sites More sharing options...
Randy W Posted July 9, 2012 Report Share Posted July 9, 2012 (edited) http://anythingbutip...charging-guide/ The standard USB power rating will be 5V 500mA which means that a device connected will receive 5V and be able to draw a maximum of 500mA (milliampere). If your device draws the maximum load, the 500 mA figure would allow 4 connections because of the 2000 mA output. http://en.wikipedia....rsal_Serial_Bus A unit load is defined as 100 mA in USB 2.0, and 150 mA in USB 3.0. A device may draw a maximum of 5 unit loads (500 mA) from a port in USB 2.0; At a single unit load (100 mA) your device, drawing 100 mA, would allow for 20 connections without overloading the hub. So my guess is, yes, you're cool even without knowing the load drawn by your device. Edited July 9, 2012 by Randy W (see edit history) Link to comment Share on other sites More sharing options...
RobertH Posted July 9, 2012 Author Report Share Posted July 9, 2012 I asked a company for the requirements on charging so I should have the values you guys are asking for soon. The battery cells inside the speakers are between five hundred and eight 100 mA Link to comment Share on other sites More sharing options...
cjr818 Posted July 9, 2012 Report Share Posted July 9, 2012 Most electronics with USB charging capability will trickle charge drawing roughly 550 mA. The exceptions are of course the newer smart phones and tablets. Link to comment Share on other sites More sharing options...
RobertH Posted July 9, 2012 Author Report Share Posted July 9, 2012 AMP Freq Range: 200Hz-20kHzS/N: More than 80 dBLine input: 3.5mmWorking time: 4-5 HoursDry / Li Battery Capacity: 500mABattery Voltage: 3.7VBattery Charging Voltage: 4.3VBattery Charging Time: 4 HourRating Power: 3W+3WImpedence: 40hm*2Power Supply Input: mini USB(5V/500Ma Link to comment Share on other sites More sharing options...
RobertH Posted July 9, 2012 Author Report Share Posted July 9, 2012 So If I understand some of the posts from befor if the charger has the 2000mA rateing and the speakers are Power Supply Input: mini USB(5V/500Ma I can charge 4 at one time on this hub? Link to comment Share on other sites More sharing options...
dnoblett Posted July 9, 2012 Report Share Posted July 9, 2012 So If I understand some of the posts from befor if the charger has the 2000mA rateing and the speakers are Power Supply Input: mini USB(5V/500Ma I can charge 4 at one time on this hub? More than likely charging current will be in the neighborhood of 550 to 600mA so probably no more than 3 pairs on a hub using a 2000mA power adapter. Link to comment Share on other sites More sharing options...
cjr818 Posted July 9, 2012 Report Share Posted July 9, 2012 I thought I said three units. Funny stuff. 1 Link to comment Share on other sites More sharing options...
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