Quote: (Originally Posted by
Faceless)

I wonder, whether O.R. team has considered using lithium manganese dioxide batteries within current design. One of important features these batteries have is ability to withstand "capacity leak" even in cold water, which greatly impact widely available Li-Ion battery packs.
For instance here is some technical info on battery pack from Duracell, claiming pretty good shell life as well:
http://www.duracell.com/oem/Pdf/others/LithBull.pdfWe would not use user replaceable batteries (primary cells) in a life critical application. Battery contacts and uniformity of supply pose serious hurdles to getting them through any safety review.
We are using the Valence rechargeable batteries just now. See
Valence - Battery Safety
Alex