There are three types of packs that we construct in-house. The first is what we call a module, which is a single-cell-box battery. It's hot-swappable and blind-mated, so you don't have to mess around with any connectors; you just push the module in. The FX can get by with one or two modules, and you can take one out and charge it independent of the other. Our big S/DS battery pack can accommodate up to four bricks, and we can also do a three-brick pack that has a dummy cell box. They're wired in parallel, so there's a single Battery Management System (BMS), a single current sensor, a single fuse, etc. If you did that with independent modules, you'd need four of each. We have a 5-year/100,000-mile warranty and the only reason we can do that is because we've been working with BMSs since 2006.