This is a SigmasTek SP12-18NB 12V 18AH Battery with the following characteristics:
Voltage: 12V (12 Volt)
Capacity: 18AH
Terminal: NB
Dimensions: Length: 7.13" Width: 3" Height: 6.59"
This SLA battery can also replace: B&B Battery EVP20-12
B&B Battery BP20-12
B&B Battery BP17-12
CooPower CPH12-18
CSB Battery EVX12200
CSB Battery HR1290W
Expocell P212/200
FIAMM FGH21803
FirstPower FP12180HR
FirstPower FP12200D
FirstPower FP12200
IBT Technologies BT20-12HR
IBT Technologies BT20-12
Long Way LW-6FM20BJ
Long Way LW-6FM20S
Long Way LW-6FM20A
Long Way LW-6FM20B
Long Way LW-6FM20DC
Long Way LW-6FM20EVX
Long Way LW-6FM20AJ
Long Way LW-6FM18BJ
Long Way LW-6FM18AJ
National Battery NB12-18HR
Power Kingdom PS20P-12
Power Kingdom PS20L-12
Power Kingdom PS20D-12
Ritar RT12200H
Ritar RT12200
Sentry Battery PM12200
SigmasTek SP12-18HR
Sunnyway SWE12220
Sunnyway SWE12200
Toyo Battery 6FMH18
Yuntong YT-12200
Yuntong YT-12200D