I got a "Photon" at the local battery store. Single red LED lithium
battery. Locks in on position. Battery life is 5 days. Size of a quarter
about 3/16" thick. weight is negliable Single dot of velcro and put on ear
cup of headset.

--
Kevin McCue
KRYN
'47 Luscombe 8E
Rans S-17 (for sale)