Any updates to this post:
Currently in My Tho and will be up in Nha Trang on Thursday. One of my camera batteries failed and I need another. Any recommendations for a shop that might sell Olympus digital camera batteries? Specifically, I'm looking for a battery for a Olympus OM-D, EM-5. The battery model is BLN-1(7.6V, 1220 mAh) but I'll take an equivalent if it works in the camera. The amperage isn't important but the voltage must be 7.6V. I'm not sure if Olympus uses a chip in their batteries to prevent end-users from using decent third-party equivalents. Decent equivalents in Nha Trang might be the operational words.
Other than that, I'll seek out the options mentioned in the above post. Much thanks in advance.