In addition to all the great features found in the Cellpro 4s charger, the new 10 AMP version is designed from the ground up for super-safe, super-fast charging! With support for up to 10A max charge rates and new faster Auto Charge rates (1.0C, 2.0C, and 3.0C), the new version is capable of safely charging multiple battery packs at up to a 3C charge rate. This is only possible with FMA Direct cell-balancing technology which incorporates integrated, highly-accurate cell monitoring and balancing during charge.