NorthBatt D.C GEL 150-12 battery.

The NorthBatt Deep Cycle GEL Tubular Positive Plate 12V series is designed for partial state-of-charge operation and repeated deep-cycle use.
Using GEL VRLA technology, these batteries are maintenance-free, sealed, and do not require water refilling throughout their lifetime. They are manufactured with high-purity materials and advanced GEL technology to ensure strong cyclic performance and excellent recovery after deep discharge.
Compared to standard VRLA batteries, the NorthBatt Deep Cycle GEL series uses more lead, tubular plates, and specialized materials, allowing higher power output and greater capacity across many charge cycles.
They are designed for long service life in cyclic applications, offering up to 2,200 cycles at 50% depth of discharge.