What battery for Railsounds Lionel scale Atlantic

I am not familiar with needing a battery to make Lionel Railsounds work. None of my Lionel TMCC Railsound locomotives (I have a lot - factory installed and ERR upgraded - by me) have a battery. When I find one in a used loco, I remove it.

In conventional control, I understand, the battery will keep the sounds working (that is, no brief interruption) during the F-N-R direction cycle, but I don't run things in conventional. There should be no need for one in command control (the track voltage is constant).

The Lionel system does not recharge the battery, so you will need (if you do for some reason...) a plain alkaline battery (which will leak eventually, so be aware); don't know the voltage.

Do yourself a favor and go-to Hennings trains. Get the Gunrunner John's ylb (your last battery) it's a self charging circuit board designed for Railsounds. It doesn't leak or do any damage to the Electronics. You can consider it a BCR for Railsounds Locomotives.

If you want a battery to prevent sound dropouts when you cross over switches and the like, one option is this one.  It's a battery that you'll never have to replace and you don't have to worry about it ever leaking either.

 YLB - RailSounds Battery Replacement