Setup:

  • Christmas demo, on loop, no sound
  • IPS mod
  • Display set to X brightness

Results:

  • 1v2 Gumstick 1450mAh: 3h28
  • AA Duracel Optimum (baseline): 4h59
  • 1v5 AA Li Ion USB 2600mAh: 5h35
  • 1v2 Eneloop Pro 2000mAh: 7h52
  • 3v7 14500 1000mAh + Buck: 9h16

Notes:

  • I've found an AA 3500mAh Lithium batteries, £23 for 4 though - ouch
  • The Buck is this converted from Adafruit https://www.adafruit.com/product/4711 with the 453KΩ resistor (marked 64D) swapped for 150KΩ resistor

Links: