LDO used in Atom Lite/Matrix

[robalstona]

I have question. Anybody dissassembled atom and know what type of voltage regulator are used?. I try powered atom directly from lipo battery connected to 5V pin and works approx 3-4 hours (900mAh capacity). i check battery voltage and multimeter shows 3.6V. So there is enough energy to power atom. But i guess these input voltage is to low for normal work a LDO.