Motobatt Battery MB16U 12v 21.2Ah (20Hr) CCA:250A YB16BA L:160mm x H:161mm 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.