These S-4000 series L16-sized batteries are rated at 1,400 cycles to 50% depth of discharge. The S-4500 EX series batteries, S6 L16-EX and S2 L16-EX, are made with extra thick industrial-grade plates for longer cycle life. These are rated at 2,700 cycles to 50% depth of discharge.
Rolls has renamed some batteries as follows - S-480 = S6 L16
- S-550 = S6 L16-HC
- S-605 = S6 L16-SC
- S-500EX = S6 L16-EX
- S-1450 = S2 L16
- S-1660 = S2 L16-HC
- S-1860 = S2 L16-SC
- S-1400EX = S2 L16-EX
