Thank you for having the manual I needed for an older model Aiwa stero I had found on Ebay --- I wanted the Aiwa because I had tapes and cd's but I did not have a manual as to how to operate the system... I found what I needed and it has enabled me to set the system up for my enjoyment.
I wished detailed information of the JBL S310 and here I found it! Very happy with the service from this site!
Text excerpt from page 143 (click to view)
5.
Fasten the battery case to the printer by turning the thumbwheel to the right (toward the mark).
6.
Insert the battery pack into the battery pack compartment. t The tab on the upper right side of the battery fits into the slot on the upper right side of the compartment.
7.
With the battery case towards you, press down on the left side of the battery pack until it clicks into place. t On the left side of the battery pack is a latch that clicks into place.