The TB 43-6135 addresses how to maximize equipment safety by incorporating a properly designed and tested battery compartment housing either Li/SO2 or Li/MnO2 batteries, as well as discussing how to minimize poorly designed equipment. It is essential that consideration be given to the possible use of a battery compartment early in the system design phase when Li/SO2 & Li/MnO2 batteries are being considered as a power source. This will minimize costly design changes, if at a later stage it is determined that a battery compartment able to successfully pass pressure testing is required.
Link to the document: TB 43-6135 (CAC required).