... Features1) Maintenance-free, Completely Sealed (all gases recycled internally)2) Excellent plates for maximum surface area, optimized recycling3) AGM separate design eliminates acid spills4 ... lead-acid batteries. TELONG mainly produced the following type-AGM general valve regulated lead acid battery(6v,12v,2v series),AGM deep cycle battery(6v,12v,2v series), GEL battery(6v,12v ...