The BA11 series rechargeable batteries ... are maintenance-free and can easily replace dry batteries in cyclical applications or float charging.
The Yuasa NP and NPW series generally have a minimum life of 5 years under normal conditions; Although from our experience we have already seen in optimal conditions achieving up to 30% more duration, but in harsh environments or use with deep discharges it may be less
General Purpose VRLA Battery
Lead Calcium Grids for Longer Life
Acid-Free Absorbent Fiberglass Mesh Construction
Excellent recovery from deep discharges
Usable in any orientation (except continuously inverted).