There are many ways to improve your battery life. The best one is to keep the default settings, especially for face and voice recognition.
You can also avoid placing Ulo in crowded places and set up a detection exclusion.
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Batteries settings
Ulo works with 3 NimH batteries (min 1900mA).
We tested lots of brands, all of them seem to work perfectly with Ulo.
The most important is to use AA or LR06 NiMH batteries (with FFC certification).
Ulo can charge the batteries, you don't need to get an additional charger.
Ulo is powered by a standard charging USB (5V-2A).