How about the current it draws when setting the time? This might take like 30 seconds or more to complete.
You could use a parallel supercap if the 3C currents only last for a split second. Michel On Feb 4, 3:18 pm, David Forbes <[email protected]> wrote: > On 2/3/12 5:53 AM, Jeff Thomas wrote: > > > > > > > > > > > Careful HV *and* LV cutoff threshold, with thermal scaling, is a > > design responsibility that my former employer didn't address seriously > > enough. Separator defects through contamination are a serious > > consideration with any prismatic Lithium Polymer chemistry choice. > >http://tinyurl.com/7zpn4lu > > > My oldest son and I enjoy flying high performance micro heli's using > > that particular cell. And even though they appear perfectly fine at > > preflight, we've had two cells puff unexpectedly, and one ignited > > midway through it's flight to destroy the airframe. Not something you > > could tolerate occurring on someone's wrist. > > > Please be careful. > > > Regards, Jeff > > Jeff, > > I'm aware that hobby R/C cells don't receive much QC compared to > bluetooth cells. How else could they get that low, low price? > > The actual cell that I'm considering is the GM041223-PCB made by GMB and > sold in the USA by these folks: > > http://www.powerstream.com/li-pol.htm > > I intend to ask Powerstream what qualifications the cell has obtained, > and whether it's currently being sold in quantity to another OEM as a > component of human wearable electronics. > > I'm also interested in how the pulse current affects reliability, as it > will be about 3C for a few seconds at a time. I wouldn't expect that to > be a problem since the temperature can't rise much in that time, but > you're the expert here. > > -- > David Forbes, Tucson AZ -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
