5341994-01 - Battery Automower 435X AWD, 535 AWD 18.0 V/8.0 AhFits:Husqvarna Automower 435X AWDHusqvarna Automower 535 AWDATTENTION! After replacing the battery, the mower must be updated at an authorized Husqvarna dealer. This is because the charge cycle counter needs to be reset as the 435X AWD and 535 AWD models have a limit on the number of charge cycles per battery.