HP15C LE vs. HP15C

[Katie Wasserman]

(07-06-2014 08:23 AM)Thomas Radtke Wrote:  My 15C LE still runs on its first set of batteries. I guess energy consumption when idling and running is reasonable and probably much more efficient than with e.g. the Clamshells.

The clam shells use alkaline N cells which have a relatively high self-discharge. But they also have built in RTC (real time clocks) and that is the main battery drain even when off.

The 15CLE's power consumption in the off state is about 4uA, that translates to about 13 years of battery life when off. It's 20mA when pressing a key, that's just a few hours if a key is held down continuously.

Quote:The defect brown-out detection is the problem here, and I'd even pay for a firmware that corrects for it.

I agree, this, the PSE (pause) problem and the possibility of corrupting memory when the old self-tests are run are the biggest issues with 15CLE. It sure would be nice to have new firmware available for download.