Who can help me with some general battery knowledge? I have got 3 different bikes (KTM SE, 300 & 530) and 4 different battery's. Who can help me with the following questions; - At which voltage are these batery's dead and can't be recharged anymore? - What's the difference between Amp and Voltage? - Can all these different battery's be used on all bikes or what do you have to take into account? - What's the difference between Lithium Ion (SuperB) battery and a standard Yuasa battery? All other knowledge is also more than welcome, thanks!