# World First 9v Battery That Can Be Recharged From a USB Port

by：CTECHi     2019-12-01
9 v batteries are often used in electronic products, such as programmable circuits, robots, etc. . .
But they have a big problem with a very low capacity and it takes at least 9 knots to charge a 9 v battery.
5 v charge them.
I think a lot of time for this project, because it will be an important and useful power supply for many projects.
This 9 v battery allows you to charge from the USB port in 22 minutes.
It has the same capacity (or higher)
So the use time is the same, with an average of 9 v batteries.
You can use it in any home device, such as a scale, or you can turn on the power of the 7805 regulator for charging your phone.
It can even drive a CPU fan.
There is a 3 inside.
7 v lithium ion battery with capacity of 200 mAh.
But can be powered with a 3 v coin battery.
Perfect for the old 9 v plastic battery case.
See the voltage is 8 on my multimeter. 95v.
At this voltage, the current is much higher than the simple 9 v battery.
The basis of this circuit is the TL496 CP integrated circuit.
With the 47 uF cover and inductor, the IC can lift the low voltage to 9 volts.
With this new invention, you can save a lot of money and no longer have to buy 9 v batteries.
Just plug in your laptop, desktop or wallpug and charge it in 20 minutes.
Collect the parts now!
You need to know that I can\'t find the best link and cheaper link for the part.
In my country, the total cost is less than \$5, but the electronic components are very expensive in the US.
I am trying to find the best link to the component.
But on ebay, the TL496 is \$2 and only \$0 here. 1. Sorry :(.
Some suggestions: Li
The ion battery is a lot more efficient, but I can\'t put my charging circuit in the battery box for 9 v.
There is not enough space, so I calculated the charging time.
The formula is: Hour = capacity (in mAh)/ current (in mA).
In my case, this is hr = 200/500, so the 200 battery charge time on the USB port is 0. 4 hours.
This is 24 minutes.
The maximum output voltage is 9. 2 volts.
Depending on the capacitance value.
UFIDA capacitors have higher voltage.
But working perfectly in this range: 5-470uF.
I used 47 uF because there is not much space in the 9 v battery box.
If you\'re ready, make a prototype!
Seeing the circuit on the first picture, I replaced the 3 v battery with 200 mAh 3. 7v battery.
The effect is better!
If you have completed these steps, please install the power supply using the jumper.
First I tried to use the 3 v lithium battery but the current is very low so I searched for a lithium batteryion cell.
The circuit works perfectly and the version on the 2nd image is better.
I don\'t think it\'s necessary to explain it again.
If your circuit can be welded together.
I used diodes, resistors and LED in the charger circuit.
The LED lights up when the battery is charged.
Sorry, the LED mark has been reversed polarity on the circuit.
I will correct it as soon as possible.
I welded the 9 v boost circuit first because it was a bit difficult.
But seeing the connection on the circuit diagram, everyone can build it easily.
Because it is not able to withstand the high temperature, a socket is used for TL496.
The input will be 2 and 5 pins, and the output pins will be 7 and 8, where 8 is positive and 7 is positive.
These pins are under the capacitor.
During the trip, I changed the 47 uF capacitor to 10 uF capacitor.
The voltage is the same, but it takes a smaller place.
Perfect for 9 v battery cases.
Try to make your circuit as small as mine and you don\'t have room for this gadget!
It\'s easy.
Simply solder the resistance to the cathode of the LED and then weld the diode to the forward input.
This will prevent the current reverse flow.
I don\'t have enough space inside the 9 v battery box, so I can\'t use the normal USB plug connector, so just weld the input line to another PCB board.
You do the same thing, just like in the picture.
But if you have more space, use the normal male connector.
The small LED lights up when the circuit is in the charger.
Before you weld the parts with a multimeter, test everything first.
Finally, you will get a battery, a 9 v clip, a charger and a 9 v boost circuit.
Weld them together!
First connect the negative pole of Li-
5 or 7 pins of the ion battery to 9 v boost circuit.
Then weld another wire on these pins.
This will Weld to the negative input of the charger.
The front line of the battery needs to be welded to 2nd pins like our prototype.
To this pin, the positive input of the charger.
Please see the circuit diagram on the last picture.
Then you will get a circuit like the 2nd image.
There was a switch, but then I deleted it because it didn\'t make sense.
If you finish this test.
If you plug the circuit into the USB port, the LED must light up.
Then also test the output voltage.
If everything is OK, pick up your glue gun and try to make the circuit small and easy to put in the 9 v battery box.
Under the 9 v clip, I stuck the 9 v boost circuit together.
The battery is stuck under this circuit, and the charger circuit is above the battery.
This is the simplest design and is perfect for 9 v battery cases.
Now leave the device in the charger for at least 20 minutes and put it back in the box.
Installed on any home item or DIY project and works fine.
You can also work with a very popular 7805 regulator to charge your phone.
Can\'t charge too much, but it\'s good in an emergency.
It\'s convenient to put in your pocket. Hope you liked!
Write out your opinion and vote for me.
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