Replaced a wheel motor. Took the old motor apart and two cogs had lost two teeth. Couldn't find them as spares Had to replace the whole motor unit (£175/$200). Videos on YouTube
cellePhone Battery Li-Ion for Husqvarna Automower 310 315 - Gardena Sileno City 250 500 Sileno+ (replaced 584 85 28-01) - 2600mAh / 18,5V | cellePhone mobile generation
How to replace battery of Husqvarna Automower 305(2020) 310 Mark II, 315 Mark II, 405x or 415x - YouTube
Replace battery Automower 310,315,315X
Cameron Sino Battery Compatible with Husqvarna Automower 310 Modell(2015/2016/2017), Automower 315 Modell (2015/2016/2017) (3400mAh) - Amazon.com