I'm looking at http://www.paktrakr.com and it says: Now available for Lithium (LiFePo4) and NiCd batteries!! but I don't see any other information. I suppose it means he's developed a Remote which can work in the voltage range for individual cells..?
UPDATE: I see it now. On the purchase page there is:
PakTrakr 800 PakTrakr Display and one 8-battery Remote for monitoring up to 8 lead-acid, Lithium, NiCd, or NiMh batteries. (Batteries must be less than 12V each)
PakTrakr 8-battery Remote Monitor 8 additional lead-acid, Lithium, NiCd or NiMh batteries by adding this Remote to your PakTrakr System. Use up to 5 Remotes per system, for monitoring up to 40 batteries. (Batteries must be less than 12V each)
For each you select the battery type.