A few weeks ago, it seemed like my phone battery would be at about 30% by the time I was leaving work at the end of the day, even when I hadn’t used it much. I’ve been using Llama to automatically switch off my Wi-Fi when I leave the house, but I wondered what impact leaving the 3G on all day has on my battery.
I kept track of how quickly my phone’s battery dropped with and without the 3G on over the span of a few days (table below).
- On average, with the 3G on the battery drained 5.65% per hour. With the 3G off the battery drained 3.33% per hour (41% less).
- Over the span of 8 hours, that’d be an average drain of 45.2% with the 3G* vs. 26.64% without the 3G.
*In striving for control, I didn’t use the web or any applications if I had the 3G on, so numbers reflect just idle state and anything running in the background. Obviously if you’re actually doing stuff, the drain would be greater than 45.2%.