AMAXPOWER HD Series is free maintenance deep cycle solar battery
with 15-20years design life in float service. 30% more life than
the standard gel battery, 50% more than the regular lead-acid AGM
battery. Using deep cycle design, 4BS lead paste technology, unique
corrosion- resistant grid alloy, high-quality nano silica gel
electrolyte, it is the best choice for backup and frequent cycle
discharge applications in extreme environments; Designed for use in
HOT and COLD places.