Battery

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Revision as of 19:59, 13 April 2021 by ouzle (talk | contribs) (→‎Features and specifications: Added comment about 10k NTC)
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Features and specifications

  • Battery is easily removable and replaceable (though no hot swapping?)
  • 6Ah Li-Po battery (at a nominal 3.7V, for approximately 22Wh)
  • Can be charged in the Pyra using either of two microUSB ports (one carries USB3.0 otg, the other serial debug data)
  • Includes a 10K NTC thermistor for thermal safety on middle / ground contacts
  • When it is plugged in, it works like an offline UPS.

Battery life

  • Everyday work load: 8 hours (without any power management features, tested on prototype April 2016)
  • Everything on (Bluetooth, WiFi, etc.): TBD
  • Display off, audio on: TBD
  • Suspend mode (display off, audio off, CPU running): TBD

Charger

The Pyra will charge from a standard microUSB2 cable, much in the same way as any other (non-apple) portable device made in the last few years.

Sample of potentially official charger, but as USB power warts are so common, it has been decided to not offer one in the Pyra box, to reduce waste.

See also USB

Hardware

  • BQ27421YZFR-G1D - I2C (addr 0x55) Battery monitor - System-Side ImpedanceTrack™ Fuel Gauge With Integrated Sense Resistor
    • Used to measure "VBATT"
  • AVX 009155003201006 - Battery Contacts 3Way .4um Ht=3mm 3A 2.5mm Pitch Rdc Size

The battery itself is custom designed and manufacturerd specfically for the Pyra project.

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