No need for jumper cables, just simply press the RE-START button to start your bike and drive away RE-START technology intelligently monitors the voltage and will put itself to sleep if it senses over-discharge Offers a full onboard Battery Management System (BMS) including functions such as lithium cell balancing, low-voltage cut-off, over-discharge/over-charge and temperature protections Shock and vibration resistant making them perfect for racing Does not contain acid or heavy metals such as Lead, Cadmium, or Mercury making them a more environmentally safer