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Post by joel61 on Dec 11, 2016 9:12:32 GMT
It's measuring 3.49 on the little bits of solder right behind the battery connector. Do you remember what your battery percentage was before removing it? Also that seems to be correct... Will have to have a think and get back to you about it
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Post by mcgrumpus on Dec 11, 2016 22:08:53 GMT
I think I fried it when I connected it without the battery board. Never mind. It turns on when I plug in the normal micro sd. But it then doesn't boot correctly just gives me a black screen. Not to worry. I managed to win a 2013 auction for a great price.
I'll try not to fry that one!
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Post by joel61 on Dec 12, 2016 0:32:16 GMT
I think I fried it when I connected it without the battery board. Never mind. It turns on when I plug in the normal micro sd. But it then doesn't boot correctly just gives me a black screen. Not to worry. I managed to win a 2013 auction for a great price. I'll try not to fry that one! Bugger, oh well. I just got a 2013 for $100 NZD too
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Post by chuckcheeze on Sept 17, 2017 2:44:32 GMT
Now for option 2: For this you can take out the battery and with some side cutters cute the battery protection module from the battery. Now with the blue lipo charging module solder the + and the - on the two outer terminals of the out side of the module with some wires to the + and - of the old battery circuit we snipped off. Hi Joel, did you ever get Option 2 to work on Nexus 7 2012? I tried, but I think the LIPO is expecting a battery and then not providing enough voltage to power on the pad. I get 4.12 v which should be enough, but LIPO direct into the battery module board (without battery) gave me a blank screen. plugging in micro USB gave me a staticy screen, but never fully powered on. Ive used this standalone battery module board with direct 5V USB, but it was at 100% and when micro USB was plugged in, it was doing a weird power off at 100% (tasker sense no charge) and start powering down.
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Post by njordan on Jun 22, 2018 19:09:21 GMT
hello, hope someone can help me to get my Nexus7 2012 work without battery. From my Point-of-View i've done everything like in this and other instructions.
Opened my Nexus, did unplug the battery.....removed RED and BLACK wires....and connected the red/black to the BAT pins of the TP4056 board....receiving arround 3,9V...which should be fine. I left the sensor(?) wires in the middle of the plug connected so these two wires still run into the battery management board...and the battery is still connected to the board, except of course black and red wires....
But nothing works...not turning ON at all. when bringing back in the original supply (meaning the red and black wires from the original battery) it works again.... When replacing the supply by a lab supply with stable DC 4,2V and 1,5A max current it still does not turn ON....when trying a 18650 Lion-battery to replace the original battery - again nothing works.....
So i'm cluesless not as others write how easy it was/is and in my case the tablet simply does not go ON even if i press the power button for longer time.....
I also assumed that maybe the backcover needs to be ON in order to provide the antennas, but trying with and wihtout and without cover and original battery it seems to be no requirement to start the tablet.....
Really frustrated a little, if you could provide hints or ideas why in my case it does not work as easy - highly appreciated. Regards! Norbert
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Post by godmd5 on Nov 25, 2018 10:05:44 GMT
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Post by jateelover on Sept 22, 2019 3:48:47 GMT
You may be long gone at this point, but I did the mod with the battery still in. Works perfectly, just wanted to say thanks. The lipo board gets a bit hot so right now I just have it on an ACC fuse that works on the ignition until I feel comfortable with it. My issue was that the Nexus would never stay charged on the OTG cable only, would slowly discharge unless I shut off the screen (I have it soldered into my vehicle menu button). WIth this, it charges quickly, which is mostly what I need.
Added one of those carplay usb dongles and the nexus 2012 is plenty good for just running the carplay app. Maybe someday i'll be comfortable enough with the chip to always have it on.
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