WDG series is pure GEL battery with 15~20 years floating design life, it is ideal for standby or frequent cyclic discharge applications under extreme environments.By using strong grids, high purity lead and patented Gel electrolyte, the WDGseries offers excellent recovery after deep discharge under frequent cyclicdischarge use, and can deliver 400 cycles at 100% DOD. Suitable for solar,CATV, marine, RV and deep discharge UPS,communication , and telecommunication , etc.