The 12V 200ah Back-Up Battery has the following features; 1 High purity lead-tin alloy, reduce battery self discharge rate and increase battery service life. 2. ABS battery case made by LG raw material to increase battery service life. 3. Heat sealing technique instead of glue sealing to increase the tightness and stability of battery. 4. TTP technique not only reduce internal resistance and  material cost but also increase battery life. 5. Conduct four large current discharge texting before package to insure battery quality. 6. Full charge before delivery. Buy and use it directly.