The lightest Core-M convertible is now available via import. Panasonic RZ4. (Update: Video)

Updated on 07 January 2015 by

Let’s start 2015 with a post about a product that might not get beaten by the end of 2015. It’s a product that weighs less than the first touchscreen Windows UMPCs of 2006 and yet includes a Core CPU, full keyboard, 10-inch Full-HD touchscreen and 10+hr battery life. It’s the Panasonic RZ4 convertible and it’s the best engineered sub 1KG ultra-mobile PC out there. It’s expensive and difficult to get hold of but there’s technology in this product that you won’t find anywhere else in the market.


I’ve had some hands-on with a similar Panasonic designbut the new RZ series takes it a step further than the AX2 of 2013. This convertible PC weighs just 1.64 pounds (745g) which is the same weight as the first 3G iPad. That’s the only comparison possible between the two devices because this Full-HD tablet is also a laptop that runs Windows 8 on a Core M CPU with a 128GB SSD.

The cost is high for this ruggedized convertible with a hot-swap battery but it could replace a desktop PC if you’re not into high-end video editing or gaming and the premium versions come with 512GB SSD and a 3-year warranty. We’re looking at imports at and the cost starts at $1749 for a 128GB with 2 year warranty (RZ4A/128.) The premium model (Rz4A/512 with 8GB RAM, 512GB SSD faster Core M 5Y70, Windows 8.1 Pro and a 3-year warranty with accidental damage cover costs a heart-stopping $3799.90. Good engineering costs a lot of money, especially when it’s built to order.


“Despite its light weight and 0.77” (19.5mm) thickness, the RZ is designed to pass a 2.5-foot drop test and 220-pound pressure test.  It’s ultra-durable, as well ultra-thin-and-light.”

We’ve asked Dynamism to give us details on whether this is fanless and the exact battery capacity in Wh and we’ll update when we get that information.

Update: There’s a fan. Battery capacity is 36Wh. We have a video hands-on by Mobilegeeks below.

Source: Dynamism.



More from us. (No silly ads.)

11 Comments For This Post

  1. simplytom says:

    Last week I bought a Surface Pro 3.
    This baby is lot nicer :)

  2. Pascal says:

    it’s a dream machine: small, light, 10hours on battery, and a real PC with a keyboard too… The only negative stuff is the price…

  3. Tom says:

    If only I could afford one. I wonder how much cheaper these would be if they’re officially sold in the US.

  4. James says:

    I’ve been looking for a fanless Core M notebook with the smallest footprint. So far I’ve been eyeing the Dell Venue 11 Pro 7140 with the mobile keyboard dock.

    This Panasonic notebook is even better: screen folds back further, possibly more rugged and, best of all, a smaller footprint. Too bad it costs at least 2x as much as the Dell to import through Dynamism. Panasonic should enter the US market so I can buy an RZ4.

  5. animatio says:

    finally … somebody did it: the ultimate netbook, we all dreamed of.

  6. molasses says:

    I’d buy this if I didn’t have to pay the costs for importing it. I love the 10.1″ 16:10 screen. If I didn’t have to buy it through an importer then I’d opt for a 5Y10, 8 GB of RAM and a 256 GB SSD without the 3 year accidental damage warranty.

  7. ascot says:

    Can this run Linux distributions adequately? If so, I’ll buy the 5Y70 version in black.

  8. J. Mills says:

    Does anyone know what the accidental damage warranty covers? Their warranty page has something called “Special Wide Warranty” which includes “accidental damage coverage” but then the section mixes in information about the “Dynamism Rescue Warranty.” It doesn’t seem to be well organized. Not a good sign.

  9. Michael says:

    I have one of the more expensive versions of this, bought in Tokyo a few weeks back. I can verify that it does have a fan – silent, rarely noticeable.
    The screen is amazing: not only the high res, but also less reflective than any touch screen I’ve used.
    Optional extras: a cover that clips over the keyboard for when the screen is folded back. I use it instead of my desktop; it’s also replacing my Kindle for reading.

  10. Mark says:

    Thanks for the info! I wonder how resistant it is from collecting dust. I’m looking for a sealed fanless device because I’ll be using it in dusty/sandy places.

  11. jon says:

    I would have bout the premium black one (it looks the least cheapest) if this was fanless. Oh well, I guess I’ll settle for one of those 8.9″ Bay Trail UMPCs that’re being announced. So far the Toshiba Satellite Click Mini is on the top of the list because of the built-in mouse.

Recommended Reading

Top Ultra Mobile PCs

Dell Latitude E7440
14.0" Intel Core i5-4200U
GPD Win 2
6.0" Intel m3 7Y30
Medion Akoya Mini
10.2" Intel Atom (Diamondville)
Samsung NC10
10.2" Intel Atom
Lenovo Ideapad Flex 10
10.1" Intel Celeron N2806
GPD Pocket 2
7.0" Intel Core m3-8100Y
Acer Aspire E11 ES1
11.6" Intel Celeron N2840
Google Pixel Slate
12.3" Intel Celeron 3965Y
Viliv S5
4.8" Intel Atom (Silverthorne)
LG G8X THINQ Dual Screen
6.4" Qualcomm Snapdragon 855