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Skepticism · agriculture · politics · technology
Header image
Skepticism · agriculture · politics · technology

Wireless Qi charging with Zerolemon battery on the LG G3

| Posted on in gadgets

I recently bought another LG G3 to use with my Zerolemon 9000 mAh battery. It’s kind of a software downgrade, but the G3 is still the best Verizon phone for the farm and my Nexus 6 won’t last past noon.

I’ve gotten used to Qi charging on my Nexus 6 in the last seven months, though, so I needed a way to get Qi charging to work with my Zerolemon battery. Forums weren’t much help, so I got out the soldering iron and decided that I was going to hardware a Qi charging coil to my G3 and battery. Once I got everything together and lined up, it turns out all it takes is a little tape and maybe some folded paper.

Buy the Qi sticker from Amazon.

Get the Zerolemon battery from Amazon.

The sticker is designed for the normal case. It comes with a black sticker that you can discard. Don’t peel the adhesive backing from the charging coil. Align the contact points of the coil with the points on the phone. Tape it down firmly, making sure not to cover the laser sensor for the camera or the buttons which are nearby.

2015-05-31 16.41.36Run the sticker up along the edge of the battery and lay it over the back. It conveniently lines up just right with every standing Qi charger I have, so tape it down.

After a couple times removing the battery to get to the SD card, the tape became a little weak. I found that folding some paper and wedging it under the plastic back cover over the contact points was enough force to keep the contact points pressed down.

2015-05-31 16.45.52

The back cover then fits over the battery and charging coil like normal.

 

2015-05-31 16.41.59

Charging works great on stock firmware as well as stock-based ROMs. I’m still hoping the Qi charging for AOSP-based ROMs gets fixed someday.

2015-05-31 16.49.16
  • Loring Redding

    is it still working well

  • Working great.

  • SyCoREAPER

    I know this is an old post but wanted to say thank you for your write up. I just purchased everything to do this. Never thought it would work

  • Thanks! Glad it helped.

  • SyCoREAPER

    One thing I forgot to ask. Can you feel the area raised by the qi sticker through the case?

  • I don’t notice it. It’s a really thin sticker and a really big case.

  • SyCoREAPER

    Last question, I know about the whole Litho myth and charging but I am currently doing the full cycles anyway so I can’t test.

    How long does it take about to fully charge the battery using QI?

    Also, not sure if I got a dud case but I notices the extra thickness caused my volume down key to tear where it connects to the power button, did this happen to you?

  • SyCoREAPER

    btw for anyone else with the button issue, I fixed this by cutting small thin pieces of rubber. One strip for each of the volume buttons and a circular piece (under the plastic shell) for the power button.

  • I try not to ever let my battery get too low since it’s really hard on it. The few times when it did run completely down, I didn’t time the recharge cycle. I’m using a Nexus 6 now until I start farming again, but from what I recall, I was usually down to around 20% when I got home (11 p.m.) and it would be charged back to 100% by the time I left the next morning (6 a.m.). The phone doesn’t ever fully understand the huge battery, so when it does run completely down, it’ll go down to 3% and then sit there for a long time before finally dying, so 20% is probably more like 35% if the whole cycle discharged evenly from the phone’s point of view.