The Primo 81’s 3500 mAh battery has a significantly smaller battery than the Acer Iconia A1 which boasts almost 5000 mAh. As a result the battery life is also considerably less.
In our battery life test we ran a 30 minute MKV video clip with the display at full brightness and Wi-Fi (and notifications) switched on. We recorded the decrease in battery capacity over this 30 minutes (8% decrease) and then calculated the time it would take to completely discharge the battery from this.
We can see that the small battery in the Primo 81 has a negative impact on battery life.