# Geopeitus

#### 18650 vs 3x AAA

<table border="1" id="bkmrk-%C2%A0-18650-%28vtc5%29-enelo" style="border-collapse: collapse; width: 100%;"><tbody><tr><td style="width: 22.3457%;"> </td><td style="width: 30.8642%;">18650 (VTC5)</td><td style="width: 32.4691%;">Eneloop AAA x3</td><td style="width: 33.2098%;">Eneloop AAA</td></tr><tr><td style="width: 22.3457%;">Nominal voltage</td><td style="width: 30.8642%;">3.6 V</td><td style="width: 32.4691%;">3.6 V (1.2 x3)</td><td style="width: 33.2098%;">1.2 V</td></tr><tr><td style="width: 22.3457%;">Nominal capacity</td><td style="width: 30.8642%;">2500 mAh</td><td style="width: 32.4691%;">2250</td><td style="width: 33.2098%;">750mAh</td></tr><tr><td style="width: 22.3457%;">Weight</td><td style="width: 30.8642%;">~45 g</td><td style="width: 32.4691%;">~35 g</td><td style="width: 33.2098%;">~12 g</td></tr><tr><td style="width: 22.3457%;">Energy capacity</td><td style="width: 30.8642%;">9 Wh</td><td style="width: 32.4691%;">8.1 Wh</td><td style="width: 33.2098%;">0.9 Wh</td></tr><tr><td style="width: 22.3457%;">Energy per gram</td><td style="width: 30.8642%;">9Wh/45g = 0.2 Wh per gram</td><td style="width: 32.4691%;">8.1Wh/35 = 0.23 Wh per gram</td><td style="width: 33.2098%;">0.08Wh/12 = 0.08 Wh per gram</td></tr></tbody></table>

[https://www.omnicalculator.com/other/battery-capacity](https://www.omnicalculator.com/other/battery-capacity)

#### Take a pic of webpage at certain time

```
apt install firefox-esr

crontab -e

1-5 4 * * * firefox -headless -screenshot /home/qrl/geopeitus/tom-bombadil-`date +"\%Y-\%m-\%d_\%H-\%M"`.png -window-size 1920,1080 https://keila.advent.ee/TolkienCache/OneCache.php?aare=Tom_Bombadil

1-5 6 * * * firefox -headless -screenshot /home/qrl/geopeitus/rohan-`date +"\%Y-\%m-\%d_\%H-\%M"`.png -window-size 1920,1080 https://keila.advent.ee/TolkienCache/OneCache.php?aare=Rohan
```