Own 2 Rad Rover 6+ purchased in late 2021 and 2 Radster Trail purchased this past June.  Both batteries are visually identical but the more recent Radster Trail bikes have the smart shield and they feel like better quality.  They also have the UL stamp on them. 

Even though the older RAD-S1304Y batteries are not part of the warning they do have similar construction by the same manufacturer as those listed.  Should I consider upgrading to the newer 15AH for the Rad Rover 6+.

Thanks in Advance