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Android Power Hardware Technology

Qualcomm's Snapdragon Wear 3100 Smartwatch Chip Promises Up To 2 Days of Battery Life (venturebeat.com) 45

Qualcomm has unveiled the long-awaited successor to its Snapdragon Wear 2100 smartwatch chipset, the Snapdragon Wear 3100. The new high-end chipset is "based on a brand-new architecture Qualcomm claims is the most efficient it's ever created, optimized for wearables-specific use cases like step tracking, heart rate monitoring, and always-on connectivity," reports VentureBeat. From the report: [T]he company's engineers stuffed the Snapdragon Wear 3100 with a four A7 cores and two secondary chips -- a digital signal processor (DSP) and an ultra-low power coprocessor (QCC1110) -- in what Qualcomm calls a "big-small-tiny" arrangement. The "big" A7 cores handle intensive, complex tasks like switching between apps, while the "small" and "tiny" DSP and coprocessor perform sensor fusion and other background chores. The way Pankaj Kedia, senior director and business lead at Qualcomm's Smart Wearable division, tells it, the coprocessor -- a diminutive 5.2mm x 4mm chip that's the product of more than five years of research -- is the inarguable showrunner. It taps a Qualcomm-designed memory module that draws a mere 0.6 volts of power, and it's altogether 20 times more power-efficient than the A7 cores.

It's principally meant for light workloads like listening for the wake phrases that precede voice commands ("OK, Google"), streaming music in the background, and updating digital watch faces. However, it's designed to be extensible -- OEMs can tap the coprocessor for real-time sleep and activity monitoring, for example, or for heart rate tracking. The coprocessor -- along with the DSP and A7 cores -- drive three smartwatch operating modes intended to boost battery life. Enhanced ambient mode displays a basic watch face UI in up to 16 colors, with a smoothly animated second hand, live complications, and ambient brightness. Traditional watch mode dispenses with those bells and whistles in favor of a basic analog watch face. Dedicated sports mode -- which isn't available at launch, but will arrive later with sports OEMs, Kedia said -- enables core features like heart rate and GPS tracking, but nothing else.
When compared to the Wear 2100, the Wear 3100 offers significantly improved battery life. Here's a comparison (from Qualcomm) of the Wear 3100 and Wear 2100's power consumption:

-Lowest power mode: 67 percent lower
-GPS and location batching: 49 percent lower
-Keyword detection: 43 percent lower
-Clock update once per minute: 35 percent lower
-MP3 playback: 34 percent lower
-Voice queries over Bluetooth or Wi-Fi: 13 percent lower

"The translates to gains of about four to twelve hours in practice (depending on the form factor), or between a day and a half to two days of battery life," reports VentureBeat. "In traditional watch mode, Wear 3100 devices can last up to a week on a charge with 20 percent battery (or up to 30 days with full battery), according to Qualcomm, or 15 hours in dedicated sports mode (with a 450mAh battery)." Some other features include a new more-accepted NFC chip, an improved 4G LTE modem, and a new power management system to improve the efficiency of charging. We can expect the 3100 to appear in smartwatches "this holiday season."
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Qualcomm's Snapdragon Wear 3100 Smartwatch Chip Promises Up To 2 Days of Battery Life

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  • by Anonymous Coward

    They're not for smart people, let's face it.

    • It's a choice.

      Own a smart watch - or be smart.

  • Golly gee! [wikipedia.org] Seriously though, the day my Time Steel dies will be a dark day. I'm not currently planning on replacing it with anything on the market, and I'll miss it to death.

    RIP Pebble. You were getting there.
    • by nickovs ( 115935 )

      ... the day my Time Steel dies will be a dark day.

      My Pebble Round's battery finally died and it was a dark day indeed. I recently replaced it with a Garmin vivomove HR, which has an analogue face and a small OLED display for notifications, step counter, music controls and weather, which is basically all I ever used on the Pebble, but also adds a heart rate monitor and happily lasts a week on a single charge. It's also lighter and thinner than most of the clunky "smart" watches and while it's not as thin as the Pebble it's certianly better looking. It's no

    • Why hasn't anyone picked up on the e-ink smartwatch combo? Is it patented and held by Fitbit?

      Low power bluetooth is now a widespread thing. These watches ought to be getting into the 2-week per charge range by now. Damn it.

      RIP Pebble.

  • The Pareto principle (also known as the 80/20 rule) states that 80% of Slashdot readers like 20% of Slashdot stories. The lesser known Double Inverse Pareto suggests that 80% of Slashdot stories interest nobody worth bothering with. Proof of the Pareto principle has been hard to come by. Researchers who worked through hundreds of Slashdot articles and comments have been found to suffer from PTSD, and many committed suicide.
  • by thebes ( 663586 ) on Monday September 10, 2018 @06:06PM (#57287274)

    0.6 volts of power? This isn't even pedantic, it's just plain wrong.

    • 0.6 volts of power? This isn't even pedantic, it's just plain wrong.

      Just today I learned the Tesla Model 3 can go 100 KPH on a charge.

  • by LynnwoodRooster ( 966895 ) on Monday September 10, 2018 @06:07PM (#57287282) Journal
    It pulls just 0.6 volts of power! I bet it also has 12 mA of lumens on the screen, thanks the embedded flux capacitor of 42 Ohms of impedance!
  • Comment removed based on user account deletion
  • Why didn't you make the meeting?
    Didn't you think that meeting was important?
    Do you value your job here?
    Did you ever consider that your job should have come before wearing a gadget?
    Is this box big enough for you things?
    Can you close the door on your way out?
  • 45-day battery life....
  • The subject says it all- i miss Pebble. I last charged the one on my wrist 6 days ago and it still has 30%

You know you've landed gear-up when it takes full power to taxi.

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