[pct-l] phone charger hack

[James Vesely]

There is no internal battery.  The phone battery plugs into the Anker charger and when it is charged you put it into your phone.

The charge board I installed is for a different chemistry Li-ion battery that has a nominal charge of 3.7 volts a cell phone battery (or at least a Samsung) has a 3.8 nominal voltage.   After you do a solar charge and put the battery into the phone it will read 98 percent charged, which I think is pretty good.

This could be remedied by buying a charge board with the correct charge voltage.  Either way it is a clean charge and undercharging a battery does it no harm, its overcharging that can cause problems.

Jim

From: Tom Grundy [mailto:caver456 at gmail.com]
Sent: Tuesday, February 10, 2015 7:58 AM
To: James Vesely
Subject: Re: [pct-l] phone charger hack

Very nice - how does the internal battery put up with not having a 'clean' charge?  Any info on how that would affect battery longevity, capacity, etc?

On Tue, Feb 10, 2015 at 7:54 AM, James Vesely <JVesely at sstinternational.com<mailto:JVesely at sstinternational.com>> wrote:
For those who might be interested I did a simple hack on a Anker Samsung spare battery charger that they sell on Amazon.    It involves a little soldering, cutting and epoxy glue but otherwise it is pretty simple.    It allows you to charge the battery from not only 115 volt but also from a solar panel or other 5 volt DC (USB) charge source.

The Anker charger when plugged into an outlet will charge both an extra battery and a phone through the side located USB port.

When in the field it can be connected to a solar panel, via the added circuit board hack  to charge the extra battery and it can also be charged from any 5 volt USB source such as a cigarette lighter USB device.   I tested it on the 5 oz solar panel I am selling and it works great.  It charged a half full Galaxy S4 battery in a couple of hours.

If anyone is interested I can provide some guidance in putting it together.

Here are some pictures:
https://plus.google.com/u/0/photos/100489363658004251804/albums/6111287435181323441


Jim
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