The Yuasa NPW45-12 NP45W/12 is a VRLA lead-acid battery with a capacity of 8.5 Ah and dimensions of 151 x 97.5 x 65 mm. It features low self-discharge levels, is maintenance-free, and offers a high number of charge cycles. This AGM battery is suitable for use in applications like uninterruptible power supplies (UPS) and emergency lighting systems.