I just installed this DIY 3-coil fast charger, $8 shipped on the slow boat from China:
Qi Wireless Charging PCBA Circuit Board Qi-standard 3 Coils CE FCC Certification 604339947410 | eBay
Nice thing is it's a 10W Qi fast charger - verified with ammeter it's doing >2 amps (5V) on both an iPhone X as well as a LG V30, and sits under the stock pad!
It's low-profile as the coils are on a thin metal plate, and placement doesn't interfere with the four circular indents, so the stock rubber pad's nubs will seat nicely in the original holes and the phones will sit flush and not bounce off the modest bottom lip and fall into the compartment below. I could've used a bit less painter's tape, but I was in a bit of a rush.
3-coil allows more flexibility of placement of different sized phones, but does mean six wires instead of two need to wrap around the side. Pro Tip: To get enough length to wrap the wires around and have the circuit board on the backside, the coils are lightly glued to the backplate - so you can cut the yellow cellophone tape holidng the coils together, and "uncoil" a little bit more length.
There is also a blue glowing LED charging indicator, for an extra touch, with enough length in its two wires from the circuit board to wrap around to the front. However, it was delicatly soldered to the wires and I accidentally broke off the solder connections - but it should be easily mountable with a bit of care.
Qi Wireless Charging PCBA Circuit Board Qi-standard 3 Coils CE FCC Certification 604339947410 | eBay
Nice thing is it's a 10W Qi fast charger - verified with ammeter it's doing >2 amps (5V) on both an iPhone X as well as a LG V30, and sits under the stock pad!
It's low-profile as the coils are on a thin metal plate, and placement doesn't interfere with the four circular indents, so the stock rubber pad's nubs will seat nicely in the original holes and the phones will sit flush and not bounce off the modest bottom lip and fall into the compartment below. I could've used a bit less painter's tape, but I was in a bit of a rush.
3-coil allows more flexibility of placement of different sized phones, but does mean six wires instead of two need to wrap around the side. Pro Tip: To get enough length to wrap the wires around and have the circuit board on the backside, the coils are lightly glued to the backplate - so you can cut the yellow cellophone tape holidng the coils together, and "uncoil" a little bit more length.
There is also a blue glowing LED charging indicator, for an extra touch, with enough length in its two wires from the circuit board to wrap around to the front. However, it was delicatly soldered to the wires and I accidentally broke off the solder connections - but it should be easily mountable with a bit of care.
