Camera manufacturers often warn against lithium batteries (e.g. Canon warns against using them in early versions of the EOS 1N's power drive booster E1) because of voltage spiking and the often-quoted steep 'death dive' as the battery nears exhaustion, which can leave shutters and drives in limbo. I've only used LR44 s/o button cells in remote control units with no problems and never knew such were available in lithium versions. For the bigger batteries (e.g. AA), I usually hedge a preference toward alkaline but they being heavier means lithium invariably wins hands-down (and wallet empty...!).