The longest Prime Day ever is officially underway (through July 11) and as per usual, Amazon has discounted its own devices to some extreme lows. While we haven't been super impressed by the Echo deals overall, things like Kindles, Fire tablets, and Fire TVs are seeing their best prices ever by a long shot.

If you haven't shopped Amazon's Prime Day laptop deals, you're running out of time. Get massive discounts on Editors' Choice-winning portable PCs from Apple, Dell, Lenovo, and more.

Momentum Commerce, which manages online sales for 50 brands, said its Amazon purchases plunged 41% on Tuesday when compared with the start of Prime Day last year.