MAINTENANCE FREE Dry Charged (Conventional) Maintenance Free MAINTENANCE FREE 38B19R/L NS40Z(L) (12V35AH) 46B24R/L NS60L (12V45AH) 65D26R/L N50ZL (12V65AH) 75D31R/L N70ZL (12V75AH) 95D31R/L NS100L (12V80AH)