I powered my ESP8266 Dev Board using 18650 battery.
I connected 18650 battery to "IN" pins of XL6009 and then Out pins of XL6009 to Vin pin and GND pin of ESP8266 Dev board.
I also adjusted the Output voltage regulator so that the out pins were giving 5V and 1Amps of current.
But on doing the above connection Esp8266 fried within seconds.
Kindly tell what went wrong...
Did you do this before you connected it to your ESP8266? The XL6009 boards are a bit rubbish, it could be they produce spikes in excess of the voltage required to drive your ESP8266.
Could you supply links to all the parts you have bought.
Thanks for the reply!
Yes, I adjusted the Output voltage regulator before connecting to ESP8266. I measured with Multimeter and it was exactly 5V and 1A
Unfortunately, I also tried the same thing with Arduino nano also before writing this post, and fried that too.
Then I thought May be I should Power ESP8266 via micro USB instead of Vin, So I connected a micro USB cable at the "Out" end of XL6009 and connected it to ESP8266.. Frying up my 3rd Dev board.... 
I purchased XL6009 from local shop but that is genuine
Kindly help me!!
Can you suggest any other module instead of XL6009 that I can connect to 18650 battery to power ESP8266
How can determine the Amps ? , regardless, normally speaking a 8266 dev board has a AMS1117 3.3v regulator to reduce Vin to 3.3v and unless that got powered with anything over 12v, even the spikes should not fry the MCU.
And how are you sure that you've done that ? doesn't it work anymore when you connect the USB port ?
You can use a MT3608 in combination with a couple of capacitors, an inductor of 22uH and a few resistors, but in that case, you may as well set it to 3.3v and power the ESP with that, bypassing the regulator all together, which is probably the way to go with the XL6009 as well though.
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How can determine the Amps ?
I checked the amps and voltage both from multimeter itself. I thing confused me that on adjusting the voltage regulator, the voltage was gradually changing, but the current remain 1amps in multimeter on all voltages.. Is it because the 18650 battery gives 1amps only..
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And how are you sure that you've done that ? doesn't it work anymore when you connect the USB port ?
I cut the micro usb cable, then joined its + and - cables with out pins of XL6009 and attached micro usb to ESP8266.. It fried within few seconds.
I found a great booster module. Can I use this instead of XL6009 and connect Its USB port to ESP8266 micro USB port??
How do you check amps from a multimeter? Have you got some load in series's with the meter? Otherwise the meter simply looks like a short circuit. Connect that across a power supply and the current limit of any supply will come into play.
I don't believe that statement is true.
No there is no such thing, they are all crap badly designed Chinese rubbish. I have never be able to get more that 750mA from them.
What about actually answering the question I asked you?
Of course you can.
That was not what i asked. I asked if you have tried to connect it to a proper USB port again. 'Fried' ?? did it die in a puff of smoke ? You must have done something wrong.
Let's backup a moment.
What you are saying does not make sense electrically. The folks who have responded have asked questions that need to be answered.
You need to STOP. Your mind is focused on your end goal. For such a problem you need to focus on the steps or you will never succeed. You've already damaged 3 boards....so maybe its time to change you approach.
Put the ESP8266 aside for a moment.
You need to provide two (hand) sketches.... INCLUDE the meter settings (i.e. range setting).
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How do you connect and measure the output voltage of the XL6009?
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How have you been measuring the 1A current you have stated?
Are you able to measure voltage and current at the same time?
How do you check amps from a multimeter?
May be I didn't understand that correctly.. The 18650 battery was connected to 'IN' pins of XL6009 and then I connected multimeter to Out pins of XL6009 to test voltage and current
Could you supply links to all the parts you have bought.
these are all the parts.. As you asked
Yes I then connected the ESP826 with the power supply using 5V 1 Amp adaptor, that I was using earlier.. But the ESP8266 is heating like hell. and on connecting to laptop, I am unable to upload the code.
Looks like the common source to all your fried boards is XL6009.
A better solution that I have found is using a 18650 battery shield like this.
It charges the Lithium battery via standard mobile charger and has dual outputs 5V and 3.3V, enough to power ESPs and Arduinos.
Hope this helps.
R_Bhutto
1 Like
Excellent suggestion 
I've even shorted the output once or twice due to wires shorting during bench top testing. No damaged circuits etc.
I've been using this very same board and have zero problems. I use one as a UPS backup for a home automation hub.
Actually I wanted to save cost, as I've to power many of my projects via battery
Any chance you may have reversed the polarity ?
hmm yeah then it's probably broken.
Well that's not working for you for now. Shield looks cheap enough though, i can hardly make something similar for that price.
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