3rd party BLN-1 Batteries (iSmart Digi, left and DSTE, right) The Olympus OM-D E-M5 is probably one of the most successful cameras from Olympus to date. With so many people having their hands on it, it wasn’t surprising that for a time their original BLN-1 battery got a shortage of supply making consumers turn to 3rd party manufacturers for that extra juice. Not to mention that these Olympus OM-D Third Party BLN-1 Battery alternatives are aslo cheap but with some drawbacks. We take a look at two 3rd party batteries I was able to use for a couple of months now – the iSmart Digi and the DSTE Battery BLN-1 and see how they fare.