The product, designed to simultaneously charge an iPhone, Apple Watch, and AirPods, was announced more than a year ago at Apple's 2017 iPhone event.
Apple has yet to provide any additional information on AirPower, even during its iPhone event last week. The company even appears to have wiped all mention of it from its website.
Tech writer Sonny Dickson said over the weekend that Apple has struggled with heat management, which affects accuracy and charging speed.
Dickson thinks it's unlikely Apple will make its end-of-year release deadline.
Daring Fireball's John Gruber said the charging pad, which uses a multi-coil design, was "getting too hot -- way too hot".
"There are engineers who looked at AirPower's design and said it could never work, thermally. ... I think they've either had to go completely back to the drawing board and start over with an entirely different design, or they've decided to give up and they just don't want to say so," Gruber said.
Apple gave a broad timeline for AirPower's launch, saying it would go on sale in 2018. Given they have removed it from their site, it looks like the technology is a dead end.