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REASON #1: For those considering which MK model in the CF-31 series and are new to the Toughbook universe, the models usually get updated over time to include faster processors, updated specifications, etc... So the 1st Generation or release is called a "Mark 1" or "MK1". The 2nd second generation is MK2, and so on. If you already own a Toughbook but are not sure which CF-31 "Mark / MK" model you have, see our other blog post. The Panasonic Toughbook CF-31 series range from MK1 (1st generation) , MK2, MK3, MK4, MK5 and MK6 (most recent generation). Now, the main reason for this headline is that only the Panasonic Toughbook CF-31 MK4, MK5 and MK6 models will support the newest Windows 11 operating system. But if you are happy with Windows 7 (that is no longer supported with MS security updates) or Windows 10 (which will not be supported by Microsoft after Oct. 2025) then the CF-31 MK1 to MK3 are still fine machines indeed! (Which we still sell) But in making your purchasing decision, you might want to consider the future upgradeability factor. Keep mind if you order an MK4 or MK5 with Windows 10 you can easily upgrade to Windows 11 for free in the future if you have applications that are only compatible with Windows 10. REASON #2: As you can see from the above chart with the higher MK models you can upgrade to 16GB ram, have faster CPU's and later generation of USB, Bluetooth connections, etc.. By buying a Black Cobra CF-31 MK4, MK5 you are also getting insurance against future obsolescence. CF-31 MK4 vs MK5: The CPU on the MK5 is actually 2 generations newer than the MK4. As such, it is more power efficient, meaning your battery will hold a longer charge. And with a speed boost of up to 2.9Ghz gives you the best performance in its class. The more efficient CPU design also generates less heat, which is an important factor for overall longevity and use in hot environments. All our Black Cobra CF-31 Toughbook's include 16GB ram, along with brand new fast SSD hard drives that are much faster than the original SATA that these units came with. SSD consume less power (giving you longer battery life) and are more reliable and silent. Of course we are the only Toughbook seller to offer a 3 Year Warranty. REASON #3: You may have noticed we left out mention of the MK6. The reason for that is the market price for this model is still crazy expensive as of February 2023. And the very high cost, for the slight hardware improvement, is frankly not worth it in our humble opinion. Over time this can change, but I feel the best "Bang for the buck" right now in 2023, is the Black Cobra Panasonic Toughbook CF-31 MK4 or MK5 models for the best fully rugged experience. https://www.techtough.com/product-page/panasonic-toughbook-black-cobra-cf-31-mk4-mk5

The Panasonic Toughbook CF-31 comes in 5 different sub-models. The CF-31 models range from Mark 1 to Mark 5 (or MK1 to MK5). When Panasonic first releases a new Toughbook model it is a Mark 1 or MK1. The next generation would be MK2 and so on... The difference is mostly in the internal hardware such as faster CPU or other upgrades. The biggest improvements for the Toughbook CF-31 line are going from an MK1 to MK2 since the MK2 models are able to handle up to 16GB of ram vs. a maximum of 8GB for the MK1 CF-31 units, other upgrades are a faster CPU speed, etc... We normally recommend the CF-31 MK2 model or newer just for the ram upgrade alone can make a noticeable speed difference with 64 bit versions of Windows 7 or 10 running. How do you know which Mark or MK model you have? You can check the bottom label that looks like this below. In this example this unit is an MK1 model. The character that comes after CF-31_ will determine which model you have according to the chart below. Sometimes if the units have a lot of wear this label could either be missing or unreadable. So you can can also check your BIOS by pressing the F2 key when you see the BLUE PANASONIC screen after turning on your Toughbook. In the example below this is an MK3. The character that comes after CF-31_ will determine which model you have CF-31 MARK FIRST 3 DIGITS MK1 CF-31A, CF-31B, CF-31C, CF-31D, CF-31E, CF-31G MK2 CF-31J, CF-31K, CF-31M, CF-31N, CF-31P, CF-31Q, CF-31R MK3 CF-31S, CF-31U, CF-31V MK4 CF-31W, CF-31X, CF-31Y MK5 CF-311, CF-312, CF-313, CF-313 This is also critical if you want to order one of our Hard drive caddy packages for the Panasonic Toughbook CF-31. Click here. I hope that helps clarify any confusion. If you have any questions please contact us. TechTough

Contact Our commitment started from 2010 when we started selling and servicing Refurbished Panasonic Toughbooks. Our mission is to offer great quality products and reliable customer service. ​ If you have any doubt, some issue to be solved or need more information about our products please call us, send us an email or write in the contact form below. SUPPORT 303.732.3330 SALES: 303.732.3803 EMAIL US Submit Thanks for writing us, will be in touch as soon as possible!

Advantages of our Global GNSS GPS ​ • Vehicle or Marine Navigation: Use in your car, boat, ambulance or RV for navigation even in areas were there is no cell service. A real GPS does not need wifi or data access. All it needs is a clear line of sight to the sky. And best of all there are No Monthly Fees! Get big corp out of your pockets... ​ • Privacy: Since you are not using wifi or cell data, no person, government, hacker or corporation can track or spy on your movements. Our Global GNSS GPS is completely anonymous. As Wikileaks has proven, your phone is a convenient spying device for anyone with the appropriate hacking technology. ​ • Doomsday / Preppers: If the grid goes down this GPS will still work so that you can locate your stash or guide your loved ones to your off the grid location. This is the ultimate prepper laptop! 2 Factors affect GPS Accuracy: Number satellites tracked and GDOP measurements ​ Global GNSS GPS covers a network of up to 59 satellites around the world including: USA (GPS) 32 satellites - Russia (Glonass) 24 Satellites - Japan (Qzss) 3 Satellites. Older GPS engines only receive satellites data from the USA system which limits you to a maximum of 32 satellites. ​ More satellites = greater accuracy. You can never track all the satellites in your GPS network, but the more their are to choose from, the more you can track depending on your location, line of sight, etc... Older Original GPS, U-Blox 6 and others Can only track GPS satellites from USA. Gives limited and less coverage than GNSS. 42 42 38 31 46 41 43 36 36 36 36 40 Only 12 satellites were tracked with original GPS Global GNSS GPS 12x USA "GPS" 6x Russia "GLONASS" 2x Japan "QZSS" 27 32 36 32 23 30 41 46 38 40 39 40 42 41 35 37 38 31 19 Global GNSS GPS tracked 17 satellites vs. 12 for older GPS What is GDOP "General Dilution of Precision"? ​ GDOP (general dilution of precision) is a measurement that is used to describe the quality of the satellite constellation or geometry positioning in the sky. If the satellites are bunched together in the same area of the sky then your DOP measurements will be higher = GPS accuracy will suffer. ​ Ideally, the best DOP value would be obtained with one satellite directly above the receiver and three others evenly spaced across the sky with no landscape obstructions. So with a Global GNSS GPS you track far more satellites, which in turn gives you a much better DOP result = better GPS accuracy. ​ DOP (dilution of precision) - VDOP (vertical dilution of precision) relates to the elevation measurements - HDOP (horizontal dilution of precision) relates to the horizontal position - PDOP (positional dilution of precision) is most widely presented value in GPS receivers. Test results of GDOP: Ublox 6 vs. Global GNSS GPS UBLOX 6 GPS PDOP 1.7 HDOP 0.9 VDOP 1.5 GLOBAL GNSS GPS PDOP 1.1 HDOP 0.7 VDOP 0.9 The smaller the numbers the better and more accurate the GPS is Bad GDOP Good GDOP In our tests, the altitude measurement of the GLOBAL GNSS GPS was 2.4 meters! (7.8 feet) more accurate than the common GPS only system. HD Webcam for Panasonic Toughbook CF-31 There are 3 webcam options to consider for the Panasonic Toughbook CF-31: ​ 1) An external USB Webcam which is the cheapest option. But this is one more thing you need to carry around, you will have a loose cable flopping about when connected and of course it will not be weather proof like an internal webcam would be. ​ 2) The original OEM Toughbook Webcam which is obsolete and brutal. It has a low resolution and is really quite outdated by today's performance specifications. ​ 3) The TecroTech HD Webcam for the Panasonic Toughbook CF-31 is the only fully HD internal webcam for this model. There is nothing else like it on the market, that is guaranteed. TechTough HD Webcam HD 1080p - Smooth 30 fps video recording / playback 8 Mega Pixel camera - High resolution photo quality Autofocus lens for macro and long distance viewing Built-in digital weatherproof microphone, minimizes wind noise Protected from rain, sand, moisture, outdoor elements, etc. Check out the quality of the HD videos recorded from a Black Cobra Toughbook CF-31 ​ Make sure to set the resolution in YouTube video to 1080P resolution. See the detail of the TecroTech HD camera: 3264 x 2448 pixels ​ Make sure to set the resolution in YouTube video to 1080P resolution. Great details and autofocus It features a high quality 8MP image sensor equipped with an auto-focus lens that allows it to clearly show objects up close or far away scenes. With this HD Webcam you can take Full 1080P HD resolution pictures, that will have incredibly realistic detail and colors. It also delivers smooth HD 1080P video recording and web chat option that is perfect for Messenger, Skype calls, etc.., you can do your Vlog directly from the spot or stream online. Digital weatherproof microphone ​ The highly sensitive digital microphone is weatherproof to be protected against the elements such as rain, sand, etc.. It is also designed to minimize wind noise if you are in a harsh outdoor environment. ​ TechTough is proud to announce our association with Tecrotech and we have exclusivity on pre-installed TecroTech webcams in our Black Cobra Toughbooks. If you already have a Toughbook, than the only place to buy the HD Webcam kit separately is on their website at TecroTech.com for $199.

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