Designing battery pack management for high current applications involves a few challenges not seen in the traditional Li-ion applications which were usually lower power devices, like mobile phones, media players, or portable computers. In the high current devices like power tools, the system designer needs a rugged, robust solution that can handle the high transient voltages. These transients occur when high current loads are turned on and off, especially when there are relatively long cables between the load (usually a motor) and the battery pack as shown in the example on this slide. Also, in these applications, the discharge rate and charge rate might be very different, and the traditional series protection FET architecture requires both FETs to be sized for the worst case load current.