Thread: USB cable with iPhone charger
View Single Post
Alex Atkin UK is offline Alex Atkin UK
2009-12-17 , 13:41
Posts: 716 | Thanked: 303 times | Joined on Sep 2009 @ Sheffield, UK
#6
Originally Posted by phreck View Post
I purchased a 20 dollar Mytouch3G Car charger/USB power adapter from T-Mobile and it works like a charm in the car. I just tried my Zune adapter with the microusb cable. Works like a charm. These adapters are all basically the same, and put out the same volts/watts of a USB port on your computer. Your Iphone charger will work fine.
Actually while in theory these adapters are the same, 5V out a USB style socket, they are not identical.

A USB port can output a maximum of 500mA. Most wall adapters will output at least twice this amount to decrease charging time.

This is not a problem, if they output too much the N900 will only draw what it needs. But its worth noting, because they will charge the N900 a LOT quicker than you will from a PC.

For example the N900 PSU outputs around 1200mA (from memory, as I can't find mine right now), very useful if you are going to be using the N900 while charging it. That said, I am shocked how quickly the N900 charges from the PC even if I leave the screen on IMing.

Also some people on this forum claim the N900 battery seems to last longer from a slow PC based charging, which may be so as it will be more gentle on the battery.

Originally Posted by stamenkd View Post
Yeah I received the CA-146C with my phone. However when using it with an old skinny Nokia charger, the AC3X to be specific, it takes a looong time. Went to bed, and 9 hours later it was still not fully charged, though getting there. If I use the USB cable and connect to PC or use the N900 charger that is provided, it charges in about 3.5hours.
That makes sense, as the one I saw recently only output something like 300mA at 3.7V. When you then convert that up to 5V you are talking very little mA even compared to a PC USB port, probably not enough to run the N900 and charge it at the same time.
__________________
http://www.speedtest.net/result/877713446.png

My Websites
CSD Projects - Flickr - UAE4Maemo (UAE4All Compatibility List)

Favourite N900 Applications
Picodrive - UAE4All

Please post your UAE4All compatibility reports. Even better, post them to my UAE4Maemo site!
Not sure how UAE4All works such as mouse emulation? Read the FAQ.
Last edited by Alex Atkin UK; 2009-12-17 at 13:50.
 

The Following User Says Thank You to Alex Atkin UK For This Useful Post: