The Maplin Plus NP18-12 12V 18AH 20HR (AS 17AH, 19AH, 20AH & 22AH) Sealed Lead Acid Rechargeable Battery is used for emergency lighting, general electronics, medical, mobility, security, uninterruptib more→le power supply, lawn mower, etc. Replaces the following- Yuasa NP17-12, NP18-12B, Powersonic PS12180, and NP20-12 Dimensions: L: 181mm | W: 77mm | Ht: 167.5mm Weight: 5.8kg