Greast news for H300 users!
From the IRC logs:
[22:56] * amiconn succeeded in locating the heat source on the H300 pcb when running rockbox
[22:56] <amiconn> Unsurprisingly, it's the ISP1362
[22:56] <Genre9mp3> \o/
[22:57] <egotrippen> \m/ \m/
[22:57] <amiconn> 7 °C more than its surroundings
[22:57] <amiconn> ...even more than the CPU
[22:57] <amiconn> (which runs a bit cooler under rockbox than under retailos)
[22:58] <amiconn> The ISP1362 stays at environment temperature under retailos...
[22:58] * amiconn should probably try USB host mode under retailos
[22:58] <petur> bingo
Seems that amiconn managed to discover which component consumes more power than needed (thus lower battery times in Rockbox)
Now sit back and wait for a fix commit.... (until code is written to prevent that behaviour)