I recently switched systems and upgraded from a Canon Rebel SL-1 to an Olympus OM-D EM10 mark 2. I am really loving my new little camera, and I'm hoping to do some serious shooting with it soon. However, I only have the 1 battery that came with the camera. I had 2 batteries with my SL-1 and really appreciated having a spare. I had one Canon battery and one off-brand, a Halcyon. I never had any problem with the off-brand battery in my Canon, but when I bought my OM-D the camera store guy and Olympus rep got in my head and now I'm worried about buying an off-brand battery for my new baby, but the Olympus batteries are a bit $$. Are off-brand batteries a valid concern? Are their brands that are more reliable than others? Any that should be avoided like the plague because they'll melt my camera then make it blow up? Or should I suck it up and save my dollars to buy an Olympus brand battery?