I am using the Digi-Key 478-10023-ND, 2.5F, 75mOhm@1kHz and am having good results after initial charge.
I have a big articulated, PS2 locomotive that can sit for over 1 week without being run and it starts right up with no degradation or reduction in sound, etc. Performance is good.
Should I stay with it? or upgrade to the 120Ohm ESR?
bruce