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Old 12-24-2013, 05:59 PM   #1
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Default charging LiPo battery via usb

Hi guys, i have 1s 3,7V 600 maH LiPo batterys, can i charge them directly thru usb port ? I know i can, but is it safe ?
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Old 12-24-2013, 06:26 PM   #2
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Originally Posted by bego2 View Post
Hi guys, i have 1s 3,7V 600 maH LiPo batterys, can i charge them directly thru usb port ? I know i can, but is it safe ?
Hi. I wouldn't chance it as you've got no way to control the charge. If you over charge a lipo then it could explode. Not a risk I would be willing to take! I'd use a proper lipo charger... HTH.
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Old 12-24-2013, 06:30 PM   #3
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you can charge lipos with almost any regulated power supply capable of supplying 3.75-4.2 volts. the thing is you would have to monitor the voltage on a multimeter to make sure you arent charging them to too high a voltage.
once it hits the 4.2 mark or 4.18 you need to start trimming back the amps to hold the battery at that voltage and trickle off the amps until it stop taking amps without raising volts.

if you could write software that allows you to control the usb bus and can manage the power its totally possible.
the amp limit of usb is quite low though. you could need to use a powered usb port. just like a smart phone =)
of course, smart phones have charging logic built right into them which is why you can use them with computers ect.
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Old 12-24-2013, 06:50 PM   #4
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do you know any cheap (very) charger for this battery, maybe ebay link... thanks.
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Old 12-24-2013, 09:53 PM   #5
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hobbypartz.com gens mars charger or hobbyking.com turnigy lipo chargers. there is an aweful lot of information over in the radio/electronics section on chargers. all yo have to do is search like "which charger" "cheap charger"
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Old 12-25-2013, 09:12 AM   #6
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Those cheap quadcopters like a Hubsan run on 1s lipos and come with a usb charger.

For 30-something Euro you have a charger. Free quadcopter included!
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Old 12-25-2013, 10:00 AM   #7
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I need cheap chargers because i made a few portable amplifiers for headphones and I need to charge the batteries...
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