Motobatt Battery MB18U 12v 23.9Ah (20Hr) CCA:280A 51815, YB18A, YB18LA L:180mm x H:162mm x W:90mm

Motobatt batteries are a sealed unit, so no need to mess with Electrolyte/Acid.
This battery comes with 2 years manufactures warranty. To make the warranty valid, you must register the warranty within 21 days of making the order.