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37 Posts

08-25-2008

Austin, TX

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  • Message 11 of 25

Re: Car charger for Ideapad K1

2011-12-31, 20:21 PM

I just us a converter in the lighter outlet and plug the K1 power cable into it.  Works both in car and on airplane.

0 person found this solution to be helpful.

This helped me too

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1 Posts

02-26-2012

Florida

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  • Message 12 of 25

Re: Car charger for Ideapad K1

2012-02-26, 15:56 PM

here's one I found 

http://www.nextwarehouse.com/item/?1144048_p3g  good price and 5volt dc

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74 Posts

12-22-2011

USA

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  • Message 13 of 25

Re: Car charger for Ideapad K1

2012-02-26, 17:53 PM
Looks like it's for a Thinkpad and not a K1 tablet.
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60 Posts

01-27-2012

NH

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  • Message 14 of 25

Re: Car charger for Ideapad K1

2012-02-26, 18:22 PM

The K1 only charges through the propietary connector.  You need 12V through pins 1 & I believe pin 34 of the connector (if you look at the graphic of the stock charger, it shows what pins.

 

The USB connector are pinned on 21, 23, and 24 (not sure of 4th pin).

 

If you shove 12V through the USB conector, you will not only NOT charge the K1 (since the it is not connected to the power pins, but will likely fry the circuits.

 

There is NO WAY to charge the K1 with 5V as the battery (an L10M2121) has a base voltage of 7.4V @ 3.5 Ah (3550 milliamp).

 

Many large tabs use 7.4V batteries and are not chargeable with usb (Iconia, for example) - though not all. 

 

Even many small tabs (Kindle Fire, etc) , although charge with 5V, would take forever to charge at the standard usb spec 1/2 amp.  When the small tabs are chargeable through USB, they usually still have a charger that pushes 1 to 2 amps (Kindle Fire's charger is 1.5amp) because the batteries are almost always 3500 milliamp or higher.  This is accomplished by tying the D+ and D- pins together to notify the client to go into "charging" mode."

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3 Posts

02-27-2012

Ontario Canada

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  • Message 15 of 25

Re: Car charger for Ideapad K1

2012-02-27, 0:24 AM
I agree with spuchacz.
A 110v converter in the cigar lighter and plug you K1 into it.
Works for me.
Regards - Ted
 
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72 Posts

11-27-2011

TN-USA

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  • Message 16 of 25

Re: Car charger for Ideapad K1

2012-02-27, 23:55 PM

walter1313 wrote:If you shove 12V through the USB conector, you will not only NOT charge the K1 (since the it is not connected to the power pins, but will likely fry the circuits.
Actually on the K1 standard USB cable the USB +5v line (pin 1 on USB plug) is not connected to the Lenovo end of the cable.  You won't charge the tablet, but you won't burn anything up either.
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41 Posts

12-30-2011

Orlando, FL

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  • Message 17 of 25

Re: Car charger for Ideapad K1

2012-06-13, 20:40 PM

I purchased a car charger for my K1 off Ebay.  From Hong Kong I believe...$9.99.

 

It works. BUT, I believe it takes nearly twice as long to charge as from the AC adapter.

 

But, its still good to have a car charger.

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48 Posts

01-31-2012

USA

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  • Message 18 of 25

Re: Car charger for Ideapad K1

2012-06-14, 1:52 AM

orlandotek, do you have the seller's info?

 

Thanks!

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41 Posts

12-30-2011

Orlando, FL

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  • Message 19 of 25

Re: Car charger for Ideapad K1

2012-06-29, 8:07 AM

Seller:

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266 Posts

08-27-2009

Virginia, USA

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  • Location: Virginia, USA
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  • Message 20 of 25

Re: Car charger for Ideapad K1

2012-06-29, 11:47 AM

I bought one, too, from this seller: http://myworld.ebay.com/storesb2c_sz

 

Good price ($9.59) including free shipping, seems to work fine.

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