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Why is my portable charger doing this. Answered

Okay so everything is solderded correctly with the right amount of voltage on the data lines. When i check the voltage it says 6.54 but when i plug my usb up to my phone it drops to 2.89 why is this? I used this https://www.instructables.com/id/Make-a-USB-iPhone-iPod-Charger-On-The-Cheep

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icengBest Answer (author)2012-12-11

You have a mistake on your 7805 regulator pins.
The unconnected output voltage MUST read 5 VDC
even before connecting up the iPhone...

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tramont (author)iceng2012-12-17

the outuput is reading 5v but its like when a load is put on it thats when the voltage drops to 2v my other charger was built successful

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iceng (author)tramont2012-12-17

Insufficient Battery
Like Steve said Dec 12

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tramont (author)iceng2012-12-18

yea ima try a duracell or energizer battery instead of these cheap dollar store ones

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steveastrouk (author)2012-12-12

Once again, a 9V rectangular battery is going to really struggle to drive anything LIKE charging current for a USB charger.

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frollard (author)steveastrouk2012-12-12

+1

9v batteries are garbage except for very low drain 'higher' voltage applications - like smoke detectors. Everywhere else they are a waste.

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