Motobatt Battery MBTX16U 12v 20.1Ah (20Hr) CCA:245A YTX16BS, YTX20CHBS L:151mm x H:161mm x W:87mm

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.