Yes, we've all seen how most AGMS say they can be mounted in any position but for upside down. This no doubt makes their marketers have a wet dream.
BUt the tellycom jars are much thinner, taller, and longer, and likely would never have any reason to be mounted in any orientation but right side up, and stacked side to side for the shortest possible interconnects.
This thin tall wide plate orientation might not enjoy being bounced around on their sides, if they were ever installed in such a manner.
So anybody ever see any tellycom battery documentation say that they can indeed be mounted in any orientation but for upside down?