{HEAD ~ A device} for testing a battery, particularly a small, portable battery, comprising a flexible, transparent substrate on which is deposited {TAIL ~ a narrow band} of a black light absorbing material 
{ HEAD ~ A device } for testing a battery , particularly a small , portable battery , comprising a flexible , transparent substrate on which is deposited { TAIL ~ a narrow band } of a black light absorbing material
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH