The fastest Bosch charger is best suited for eBikes that are used a lot & charged frequently. 

The charger is compatible with all Bosch motors from 2014 (Gen. 2, 3, 4) with the "Bosch eBike System 2".

For Bosch batteries with "eBike System 2" as of 2014
Fast 6A charging current
Dimensions: approx. 200 × 90 × 60 mm

Weight: 1 kg

Charge time guide:

PowerPack 400: 50% charge: Approx. 1.0 hours, 100% charge: Approx. 2.5 hours

PowerPack 500: 50% charge: Approx. 1.2 hours, 100% charge: Approx. 3.0 hours