An entry in the Neoflash Coding Comp, heres the details:

Freemaan posted this:

Uptime DS (v0.1)

..:escription::..
I created this app to test energy-consumption of different cards and batteries.

..::How to use::..
If you are using a DSLite, next to the "Enable light" option you can set the light
level (set to "-" if you are using a normal DS).
You can set the SRAM saving interval (1 min or 5 mins).
GBA Slot, DS Slot and the battery options don't have real function, these are only
for logging purposes
When you press the START button the saving will start and you can close the lid if you want.

..::Saving::..
It saves the previous bechmark to the SRAM, so be careful, everything in there will be erased when you press the START button! Saving to CF/SD doesn't work yet.

..:Tested with::..
-WiFiMe (works great, if a GBA cart with SRAM inserted)
-Flash2Advance Pro (works great)
-SuperCard SD (works, but the save in SRAM losts soon after turnoff)
-DeSmuME (doesn't work, because of no RTC emulation)
Unfortunately I don't have a MK 2/3 so I can't tell wether it will work or not.

..::Version history::..
-0.1 - initial release

..::Known bugs::..
-Rarely when you press start, it freezes.

..::Todo list::..
-Fix saving to CF/SD card
-Increase the battery strain somehow

Enjoy!

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