This might be true of just the latest up and coming urban myth. The idea here is that you try and save some money by buying off brand batteries for your Nikon D70 and because they are a little short on the safety features they can explode in your camera if they fail. I can see how if a device decides to pull a huge amount of current and the battery isn’t limited somehow it might be a problem, but then again batteries naturally have an internal resistance so there is only just so much power you can get from them at any given moment.