Mir is still not a low battery come across that has exploded or caught fire during charging. But I had also no cheap battery, reaching the capacity specified by the manufacturer, some of them are considerably lower than the performance of the originals. The battery icon 'empties' significantly faster, even I had to admit that the display is very inaccurate in the low batteries. Say, you have to take a two spare batteries buy and take with you on photo tour. Therefore I take prefer the original, here I get the promised performance and should not replace the battery pack again after a short time.