I've got 16 (sixteen) CSB Rechargeable 12V 21W Sealed Lead Acid Batteries (HR1221WF2). They are USED, but still in a working condition. Still great for powering equipment.
Output Voltage: 12 V
Capacity: 21 W
Length: 90 mm
Width: 70 mm
Height: 106 mm
Type: Sealed Lead Acid Battery
Unit Weight: 1.8 kg
$5 each. Pick up in Sydney only. Strictly no postage. Please PM to discuss how many you want, pick up location and time.