the cell master can charge LIPO but only up to 1amp/hr max. The silent charger can charge all types of LIPO's up to about 7 amps/hr, so it is much better match for lipo use. They also have a silent charger docking station that can balance the lipo but it is an unnecesary option. The silent charger is about $160 new USD.
You can also buy the purple or blue cell masters, and put the silent charger board inside the pretty anodized case. Thats what I have done. PM me for insutructions!