@ToledoEd posted:1. This is a PS/2 3v system (board). {it has the charging connector in the bottom of the tender)
2. I'm replacing the speaker.
3. I'm sure 2, 1.2v Ni-Cd 700mAh rechargeable batteries will work . Any harm if the mAh is higher say, 800 or 1000 ? No problem using higher capacity cells.
4. BCR replacement vice batteries. The J&W 3v BCR2 is an alternative to rechargeable batteries. Since the battery holder/pack is now soldered to that recharging connector, is that an issue if I simply snip the current battery holder wires and solder the leads from the BCR2 to them? Correct, in some engines that had the battery holder, there may not be the 2 pin connector where the more recent battery pack could plug in (same connector on the BCR2). As such, yes, the charging jack is just another parallel point in the circuit. That said, just like @gunrunnerjohn pointed at earlier, I make my own super capacitor with the matching JST-PH connector that plugs directly into the PS2 3V board. The idea being less connectors, less extra wiring, one less place to fail.
4A. QUESTION: If I use rechargeable batteries, do I need the MTH battery charger (MTH50109) to recharge the batteries, or do they recharge from track power? No, that's why they are rechargeable batteries, the system charges them from track power.
Thanks for your patience, interest and great comments and advice.
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