Parts & Accessories Spare parts
This is a 12V 18Ah Sealed Lead-Acid (SLA) battery.
Often used inside:
UPS (Uninterruptible Power Supply) systems
Alarm systems
Small solar power systems
As shown in the picture, it appears to be a UPLUS LP12-18 (12V 18Ah) battery, which is rechargeable and designed to be maintenance-free.