Hello, Monday, November 24, 2008, 0:02:27, Arnold Tibus wrote: A> You describe that using LiIon batteries are not yet the ideal way, but why A> cannot higher capacities come into play (space should be not the problem A> for on ground use in fix stations)? I simply put large rechargeable Lithium-Vanadium pentoxide coin cell with appropriate charging circuit to GPS carrier board and forgot about this question... Another solution is to put CR123 battery holder to carrier PCB, stuff it with a good quality cell and it will probably last for 15+ years, driving just clock and CMOS RAM during power outages.. -- Best regards, Yuri UA3ATQ/KI7XJ mailto:yuri@ostry.ru