In case you are wondering what the power consumption of various components of a Pandora is: I did some measurements using my System Info application to figure that out. The Pandora battery has a design capacity of 4200 mAh, or about 16 Wh at 4 volt. Because of battery wear, let's say most people will get about 15 Wh out of their battery, so if you're consuming 1W that means it lasts 15 hours. I can't really measure directly how much the consumption is when suspended or switched off. I guess I could estimate it by checking how much charge got lost, but I haven't done that yet (I never suspend or switch off my Pandora). With the lid closed and no cpu usage, but turned on (standby mode), the Pandora uses about 0.11 W. That's the base level, which cannot be avoided as long as it's running. The display itself (not the backlight) takes about 0.39 W. The backlight takes about 0.58 W if it's at max brightness, 0.1 W at the lowest brightness (besides "off"). So in total, with an idle cpu, lid open, it takes about 0.11+0.39+0.1 = 0.6 W at lowest brightness, 1.08 W at highest brightness. Wifi on takes about 0.05 W if it's just sitting idle (maintaining its connection), and about 1 W if it's sending or receiving data. Sound doesn't seem to make a big difference (except of course the cpu it takes) - I wonder why. The CPU power consumption depends on its clock speed and its usage: I only have a Rebirth model so I don't know how the 1GHz model performs. The CPU seems to be the most efficient (per MHz) at 500 MHz: it uses about 0.7 W if used 100% at 500 MHz. At a lower clock speed it uses less power, e.g. about 0.5 W if used 100% at 350 MHz. At a higher clock speed it uses more power, e.g. about 1 W at 650 MHz, 1.5 W at 850 MHz. Note of course that in typical usage, the CPU will also be used less if you clock higher; these numbers are for 100% CPU usage. So here are some estimated total power consumptions for a number of situations: - Standby: 0.11W or ~136 hours - Word processing / coding / reading stuff: ~0.6 W or 25 hours at low brightness, ~1.08 W or ~14 hours at max brightness - Light browsing (like reading mails / forums / blogs, no heavy downloading or cpu usage most of the time): ~0.8 W or ~18 hours at low brightness - Light gaming (assuming 80% cpu at 500 MHz): ~1.2 W or 12.5 hours at low brightness, ~1.7 W or 8.8 hours at max brightness - Heavy gaming (assuming 100% cpu at 850 MHz): ~2.1 W or 7.1 hours at low brightness, ~2.6 W or 5.8 hours at max brightness - Heavy gaming while doing heavy downloading: ~3.1 W or 4.8 hours at low brightness, ~3.6 W or 4.2 hours at max brightness Conclusion: the 10 hour battery life claim holds under reasonable assumptions, but of course not if you really use everything to the max.