HP15C LE vs. HP15C

[Mike Morrow]

(07-06-2014 04:27 PM)Katie Wasserman Wrote:  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.

I never owned any of the unfortunate clamshells except the HP 28C and HP 28S. These do not have RTCs. I never had much issue with their battery life, except for the battery door area breakage that occurred, especially in the S model, if batteries were left installed for a long time. :-)

Quote:...this, the PSE (pause) problem and the possibility of corrupting memory when the old self-tests are run are the biggest issues with 15CLE.

That defective brown-out detection discussed here creates the very serious problem of memory corruption that often occurs when the 15C LE turns off due to battery exhaustion. It would be only a minor nuisance if all that this defect caused was the machine unexpectedly turning off. This is IMHO the major flaw in the HP 15C LE that the original HP 15C did not have.