PowerMore can only be used if a manufacturer's approval has been granted for the eBike in question, otherwise the battery pack cannot be operated.
You can check whether the corresponding approval is available via DiagnosticTool 3, the display or the Flow app.
More information can be found in the Bosch eBike Partner Portal or in the Help Center on the Bosch eBike website. 
Portable energy reserve: PowerMore 250 is the additional drinking-bottle-sized battery for even more range
Compact and 1,6 kilograms light, the range extender can be easily attached to the water bottle holder.
The Range Extender can be combined with PowerTubes and CompactTubes of the smart system
Scope of delivery
1x PowerMore 250
1x PowerMore battery holder (EB1211001A)
1x Bottle holder (EB1210003W)
2x M5x12 (EB1210005K)
Specification
SystemThe smart system
Capacity250 Wh
Battery typePowerMore
Weight (net)1.58 Kilogram
Weight (gross)1.58 Kilogram
Dimensions20 x 8,8 x 7,5 cm