This battery comes already charged, sealed, maintenance free, and ready to install.YTX9-BS SLA Replacement Battery Compatible with Guangdong Kejian YTX9-BS - 2PK Premium quality absorbed glass mat technology AGM is ideal for ATVs, Motorcycles, Personal Watercraft, Jet Ski's, Snowmobiles and more.
AGM and GEL batteries are lead-acid and of the same battery chemistry. This battery comes already charged, sealed, maintenance free, and ready to install.