I put a YLB Rechargeable Battery in the Lionel 1931810 New York Central Hudson #5415 that arrived from Mr. Muffins today. The 10510 has a plug that goes directly into the sound board socket. The battery provides electricity to the sound system when the tender center rollers hit dead spots in my Atlas O #5 switches. It eliminates sound drop off. The YLB Battery is available from Henning's Trains and made by Gunrunner John.
Here are a few pictures of the process. Note that the red and grey wires are center pick-up roller wires. The Black wires are from the wheels on the outside rails. I tucked the YLB Battery on top of the zip tied bundle of wires and put the tender shell back on the tender.
The YLB Battery provides 5 seconds of power to the sound system to help the tender over gaps in the center rail, such as at switches and cross-overs.
Have a good Thanksgiving. Mom and I are headed to a Bob Evans Restaurant again this year. Turkey brought right to your table --- now that is something to be Thankful for.
Sincerely, John Rowlen