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[Q] using laptop battery as usb charger

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maxlieb
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Default [Q] using laptop battery as usb charger

I bought a crappy battery pack from dx.com.
the battery works but makes a horrible noise when connecting the phone to the 2A port ... 1A no problem
also it was cheap, chinese, and labled "power bnak" instead of "bank"... total crap

and then I thought... I have a practically new perfectly good huge capacity 12 cell laptop battery that is just sitting on the shelf doing nothing since I don't carry around my laptop most of the time and its connected to ac power with battery disconnected all the time....

what if I could connect a Usb port directly to the battery?
It could be a really overkill emergency charger!

Anyone knows how this can be done?
HTC Desire S, s-off, cm11 port by devil-kin
LG G2 d802, stock Kit-Kat 20b, rooted
 
maydayind
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Originally Posted by maxlieb View Post
I bought a crappy battery pack from dx.com.
the battery works but makes a horrible noise when connecting the phone to the 2A port ... 1A no problem
also it was cheap, chinese, and labled "power bnak" instead of "bank"... total crap

and then I thought... I have a practically new perfectly good huge capacity 12 cell laptop battery that is just sitting on the shelf doing nothing since I don't carry around my laptop most of the time and its connected to ac power with battery disconnected all the time....

what if I could connect a Usb port directly to the battery?
It could be a really overkill emergency charger!

Anyone knows how this can be done?

Wrong voltage.. U would frie your charging circuts..
 
maxlieb
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Wrong voltage.. U would frie your charging circuts..
When you charge from the wall socket it's also the wrong voltage... you convert it
HTC Desire S, s-off, cm11 port by devil-kin
LG G2 d802, stock Kit-Kat 20b, rooted
 
maydayind
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When you charge from the wall socket it's also the wrong voltage... you convert it
True but u asked if u connect it derectly. So stop asking questions u already know the answer to..
 
maxlieb
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True but u asked if u connect it derectly. So stop asking questions u already know the answer to..
Directly meant without a huge laptop attached to it :P
HTC Desire S, s-off, cm11 port by devil-kin
LG G2 d802, stock Kit-Kat 20b, rooted
 
MrShickadance9
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Default It's possible

Some laptops will keep power flowing to USB ports without being fully on- possibly in sleep mode. Recommend doing that if that's the case, although that's quite heavy to carry around just for charging your phone.
 
hotrodwinston
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A multi meter can tell you what voltages are coming off the laptop battery and radio shack or a local electrical supply store can get you the parts to convert the voltage to the same as the battery on the "power bnak" then it should just be a matter of making sure you have solid connection and plug in - that big of a power source would be great for camping or power outages.
Remember there is a difference between a newb asking questions and a noob question!
I'm a senior member now? When the heck did that happen?
 

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