Comments on: FAQ: USB Charging Is Taking Forever? http://www.berryreview.com/2008/05/20/faq-usb-charging-is-taking-forever/ BlackBerry News and Reviews You Can Use Sat, 11 Feb 2012 10:55:40 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: DavidB http://www.berryreview.com/2008/05/20/faq-usb-charging-is-taking-forever/#comment-7399 DavidB Tue, 20 May 2008 14:41:10 +0000 http://www.berryreview.com/2008/05/20/faq-usb-charging-is-taking-forever/#comment-7399 Yeah, it has something to do with programming the output current on USB ports. Under all versions of Windows the USB ports default to low power (assuming any connected device has it's own power supply). In theory, any driver that turns on the higher current output USB mode (such as for USB-powered hard disks) SHOULD also cure this problem. Also check this article. http://www.blackberry.com/btsc/search.do?cmd=displayKC&docType=kc&externalId=KB03972&sliceId=SAL_Public&dialogID=61421803&stateId=0%200%2061417983 I've also found a LOT of those 'USB port' wall chargers don't have sufficient output power to charge a Blackberry. They seem to work fine for less capable phones and ipods, but not berry's. I've dug around a couple times on RIM web site to find out how many mAh are required from a charger in order to charge at full rate, but no such luck. I'll probably figure it out eventually just by trial and error of chargers and charge cords that do/do not work. :( Yeah, it has something to do with programming the output current on USB ports. Under all versions of Windows the USB ports default to low power (assuming any connected device has it’s own power supply). In theory, any driver that turns on the higher current output USB mode (such as for USB-powered hard disks) SHOULD also cure this problem.

Also check this article.
http://www.blackberry.com/btsc/search.do?cmd=displayKC&docType=kc&externalId=KB03972&sliceId=SAL_Public&dialogID=61421803&stateId=0%200%2061417983

I’ve also found a LOT of those ‘USB port’ wall chargers don’t have sufficient output power to charge a Blackberry. They seem to work fine for less capable phones and ipods, but not berry’s. I’ve dug around a couple times on RIM web site to find out how many mAh are required from a charger in order to charge at full rate, but no such luck. I’ll probably figure it out eventually just by trial and error of chargers and charge cords that do/do not work. :(

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