Lionel Hershey's battery operated train G-Guage order

Product Name: Lionel Hershey's battery operated train G-Guage order
Lionel G-Guage 7-11352. Like New order condition. Opened few times for testing. Was sitting in a garage for years and never really played with. The box has few rips, but other than that still in good condition. Batteries not included. Manual is missing. Tested recently as well. Works fine. Runs forward and reverse, whistle and bell sounds work, makes steam engine sound when turned on. However upon further testing what appears to be a signal from remote controller to the train is pretty weak. The remote has to be hold very close to the tender or train in order to send signal and make it run. This makes the whole playing experience kind of difficult. The tender holds 6 C4 batteries, all need to be installed inside of the tender wagon. The best if all 6 batteries are new. A rechargeable battery pack (sold separately) can be installed instead of batteries. The remote gets 2 AA batteries.