The Yuasa Battery NPL38-12I from Critical Power Supplies.

NPL SERIES – Valve Regulated Lead-Acid BatteriesThe NPL range is an enhanced NP design resulting in a longer service life (7 – 10yrs). All other attributes and operational characteristics are the same, thereby maintaining the benefit of a common mechanical and electrical design for users of both products.

Features and Benefits

Yuasa VRLA batteries can be used in any orientation excluding continuous use inverted.
Standard case material is flame retardant to (UL94) HBØ.
FR option case material is flame retardant to UL94:VØ (oxygen index 30).
NPL batteries are manufactured in factories that comply with ISO 9001:2000.FR option NPLs comply with BS6290 Part 4 (1997).
NPL batteries comply with IEC 60896-21+22.