Update: Custom cellphone induction charging
posted Aug 1st 2010 1:00pm by Mike Szczysfiled under: cellphones hacks

This is a custom back plate with induction charging circuitry that [Derek Hughes] build for his HTC HD2 cellphone. When we checked in with him last week he showed us how to add an inductive charger without voiding the warranty but it wasn’t very pretty because the stock back plate blocked the inductive field and couldn’t be used. The solution he came up with will work with any device if you want to put some time into the build.
He took two different aftermarket cases; one fits his cellphone and the other is a BlackBerry case meant for housing a credit card. After cutting a hole in the back of the cellphone case he epoxied the credit card holder in place, smoothed the seam with Bondo, and repainted. Not only does the charger fit in the credit card case, but there’s still room for a credit card. [Derek] also measured the magnetic fields around the circuitry and found they will not damage the magnetic strip on that American Express Black you’ve been keeping on you. In the video after the break he mentions the last step in finishing this case will be to locate a 90-degree USB plug as the current connector is a bit of an eyesore.








Well Derek has an ongoing process to perfect his hack. In event he does or doesn’t find a 90 degree connector he will have to again to make another case, or mod this one. With finding a connector it will still be an obtrusion. Without find a connector he will have to hack is own solution for the connection, that most likely be an obtrusion as well. Both will require a case mod to protect the connection, while a slight bump most likely will remain, but shouldn’t pose any hassle. No doubt Derek will get this to close as perfect as possible. In the video Derek didn’t say he actually measured the fields around the device, but said his research revealed they shouldn’t be high enough to pose a threat to card magnetic stripes. One of those things that everyone has to decide their own comfort level