Over the years I've replaced a few MTH 9V with the BCR1's and only had one (1) defective BCR in which one of it's connectors was not fully soldered and attached. This occurred about 10 years ago. I called J&W and they quickly sent out a replacement and explained that they discovered that one production run was faulty and that they were in the process of fixing the remaining in stock lot.
I should start the process of replacing the remaining original batteries that I have on hand. I do wonder why MTH and some forumites are/were not recommending the use of a BCR or homemade capacitor setup over the NiCd or NiMH. I believe I understand the argument that dependent upon your running/activity level of the loco should determine if you should choose a NiCd over a NiMH. But I don't understand or remember the specific details why MTH or forumites did not recommend the BCR/cap option over a battery. I am seriously considering trying gunrunnerjohn's do it yourself cap option.
Is there something different in the new PS3 (battery free) circuit design that makes a the new PS3 capacitor option now acceptable to MTH or was this more about selling batteries until MTH had a battery free (PS3) option?
I must add that from the postings of the features/design of the new PS3 board, MTH gave this new product's component design much more forward thought than prior PS2 & PS1 setups.