Car charging issue with BB9900

BB 9900 running 7.1. Working fine. :)

Biggest issue: charging it in a car stays even after lots of testing and reading forums.

Using the original wall charger (small flat black thing) - fine.
Using any of half a dozen USB cable with my Thinkpad or any other computers USB - fine.
Where fine means- theres a two-beep-sound, shortly two technical signs show up in the small battery in the uppermost left corner (the look like somewhat like "C B"), then the orange flash shows pulsating.

Using any of 3 car charger adapters for 12V with any of my USB cable in meanwhile 5 cars -theres the beep, but the "C B" does not show and sometimes the blue box stating "not enough energy" - but not always.
All of the car chargers say they support 1A.
All of the three car chargers work with my 9800 just fine.
->Every component works fine, just not together. :mad:

So cut a USB cable in half to find out about the juices:
While plugged into a Laptop: red - 5V, black earth, green 0V, white 0V
While plugged into any of the car chargers: red - 5V, black earth, green 2,7V, white 2.0V (?!). Then I used my tweaked cable and cut off the green and white cable, so 5V, black earth, green 0V, white 0V but: the 9900 would not charge either.

Maybe a hardware geek may help here - how does this decision of 'BB 9900 likes the charger, or does not like it' really work? Are there some volts needed on the green / white like some Android phones need it?

Any hint appreciated (please just not tell my to buy another charger).

Thanks!!!

DerDON

strange issue, i have a generic usb plug like charger that i use in the car with the oem cable and it is working. im getting the lightning bolt right now. sounds like you have a hardware/software bug with your phone.

i know nothing about the juice required vs and older phone but that might have some merit. my playbook will charge on that same cable but at a slower rate.

Originally Posted by DerDon

BB 9900 running 7.1. Working fine. :)


Maybe a hardware geek may help here - how does this decision of 'BB 9900 likes the charger, or does not like it' really work? Are there some volts needed on the green / white like some Android phones need it?

Any hint appreciated (please just not tell my to buy another charger).

Thanks!!!

DerDON

If the green and the white are shorted together, the phone knows it is plugged into a charge source and can draw more current or fast charge. I suppose some charge devices can signal this by shorting the two pins at the charge device itself, such as the wall plug charger. In some cases you can buy charge cables to ensure the Phone knows it is in a charge source, in which case the two small wires are shorted together where they flow to the phone, but are disconnected on the end that goes into the charge source. The charge cable will also allow you to charge from a USB port without making a data connection to the PC.

You either have one of two problems, the charge socket has these wires shorted and the Phone is not getting the current it expects and gives the error, or, you need to short the two wires or get a charge cable to force it into a charge mode.

robsteve - Thanks, you're a hero to me, that was the tip required. :):):)
Wonder why no one sells those cables!

After some soldering my new cable does exactly that - red (5V) and black(ground) go through, white and green are split in the middle, shortcutted to the phone side and open to the charger side. Tried half a dozend times, two-beeps comes and the signal for wall charger shows. Will try charging while driving... .

Just for curiosity - is this now the fast-charging-mode?

DerDON

Originally Posted by DerDon

robsteve - Thanks, you're a hero to me, that was the tip required. :):):)
Wonder why no one sells those cables!

Just for curiosity - is this now the fast-charging-mode?

DerDON

I know you are not in the USA, but AT&T sells charge cables.

I am not sure if this changes the speed of charging on the Phone, but it was a trick I learned for charging the PlayBook using a powered USB hub.

You haven't mentioned as to whether you're using an OEM RIM charger. If not, there's the issue...other chargers may not be compatible with a 9900. If you use the RIM OE charger, you won't see this issue...