Portable Battery Recommendations

Richard AG5M

I loved the discussion about Portable Antennas, learned quite a few new ideas to try out.  Now for another.  To power my Ten-Tec Argo IV QRP rig (or a KX2 if I ever get one) out in the field, what kind of light weight battery would you all recommend that could power the rig, running 5 watts, for up to four hours CW and SSB.  I have a sealed Gel-Cell but it's kinda heavy.  Appreciate all your thoughts.  72, Richard AG5M.

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