We may have found other answers which could help you.
Click here for Rotak Bosch Mower
Bosh roteck battery mower shudders/spins but then stops?
faulty bosch-al-3640cv-battery-chargerh?
Bosch Rotak cuts out after 3 seconds?
Faulty Bosch AL3640CV Charger or Battery?
Bosch charger Al 3640 cv for lawn mower is not charging. No lights?
How can I fix?