IBT BT1.3-12 rechargeable non-spillable sealed lead battery..
Replacement IBT BT1.3-12 battery pack, rechargeable 12-volt valve regulated non-spillable battery, often used in security alarms, lighting, medical monitoring devices at low price

This is a valve regulated lead acid battery, it will not leak so can be used in portable equipment without any fear of possible leakage, it is also not-hazardous so can be used indoors.
it is often seen as a battery back up battery in security and medical monitoring devices as well as in emergency lighting and many other uses, they are a very reliable energy storage use.

Not hazardous - can be used indoors.
Not-spillable - Can be safely mounted on its side.
No maintenance required.
valve regulated.
recyclable.
rechargeable.

Battery Type: VRLA, Pb, AGM, sealed lead
Voltage: 12-volt
Capacity: 1.2Ah @20-Hr, amp hour
The dimensions of this IBT BT1.3-12 replacement battery is
Length - 97mm
Width - 43mm
Height - 52mm