While you wait for answers, we may have found some information which could help you.
Success
Message
Bosch charger Al 3640 cv for lawn mower is not charging. No lights?
Bosch Rotak cuts out after 3 seconds?
Repairing a Bosch AL 3640 CV lawnmower charger?
Bosch AL 3640 CV charger repair & parts identification?
faulty bosch-al-3640cv-battery-chargerh?
How can I fix my Bosch Rotak 37 lawnmower?
Faulty Bosch AL3640CV Charger or Battery?
Bosch al3640 cv?
re spring lever on Bosch 34R mower?
How can I fix?
Faulty Bosch AL3640CV Charger?
Bosh roteck battery mower shudders/spins but then stops?