I’ve spent the last couple days conversing with a representative from Shure’s Product Management Team. Recently, Shure has released a few body packs and one transmitter that are not currently compatible with NiMH rechargeable batteries.
The problem lies that unlike conventional alkaline batteries, it seems that on all NiMH rechargeable batteries there is little or no insulation around the negative contact. With a few affected Shure products, there is a data contact that sits in between the two AA negative battery contacts. (see below)
Since rechargeable batteries are slightly wider than alkaline batteries, and/or provide little or no insulation around the contact, it can cause the battery to short out. Due to the power densities of NiMH batteries, this could cause a situation where the packs heat up – or in worst case – melt.
Shure is in the process of making the necessary product modifications. In speaking with Shure, they are looking to make a running change to their design that would go into production in the next 2-3 months.
Please note: The majority of Shure body packs/transmitters are not affected, just these 4 specific models:
ULXD1 – wireless mic transmitter
UR5 – portable receiver for camera mounting
P9RA – in-ear monitor receiver
P10RA – in ear monitor receiver
We’ll be sure to keep you posted on any new developments with the Shure product line.