Note that the BCR is $25, but the optional charger is $20 extra, so the prices between the two are very similar for Lionel products.
The Dallee is just different packaging for the exact same concept. Nothing wrong with it, but I can still build the equivalent circuit for around $12-13 for my Lionel trains and dispense with the $40 charge...
John, would you be so kind to either post or email me the schematic for the charging part? I've got several PS-1 locomotives that I'll be building BCRs for, and if I can get a few more parts and build the charging circuits, then I'll add them to my TMCC locomotives as well. I run command sometimes, but mostly conventional, so I like having the batteries in my TMCC locomotives to keep the sounds. I'm a mechanical engineer, and kind electrical stuff black magic. But I can follow a schematic with parts list to connect the dots and build basic circuits.