User Manual Bosch BCS612GB Serie | 6 Rechargeable Vacuum Cleaner 

Sorry not sure if you can, as instructions say only use the charger that's sent with it, all depending on how much you use the vacuum but i only charge it once a week and it takes less then an hour if you are going to use it a lot every day then just give it a boost charge after each use.

The battery has to be removed and plugged into a special charging station which in turn plus into the normal 13 amp mains socket. The charging station was part of the pack I purchased though I advise that you check this.

Charger is included. It sits separately on a worktop, or whatever, it's not part of the wall mount. i.e. battery doesn't charge whilst cleaner is on the wall. I would not recommend this cleaner, however, dust can is far too small and needs emptying far too frequently - a messy job.