As I look for a replacement for my BC100-1 (ODYSSEY PC925) battery, I ran across (suggested by Wolfgang) the following batteries. http://www.batterystuff.com/batteries/motorcycle/LFX18L1-BS12.html http://www.shoraipower.com/t-faq.aspx At only 2.5 lbs (compared to 25 lbs) and a reasonable $181 price these batteries appear to be a real breakthrough.Does anyone have any practical experience with the lithium batteries? Lorn --Lorn H. 'Feathers' Olsen, MAA, ASMEL, ASES, Comm, InstDynaComm, Corp., 248-345-0500, mailto:lorn@dynacomm.us LNC2, FB90/92, O-320-D1F, 1,780 hrs, N31161, Y47, SE Michigan