The Power-Sonic PS-445 battery is power-sonic's standard version of a 4V 4.5AH SLA battery that is completely sealed and maintenance free.

 

Cycle Applications: Limit initial current to 1.35A. Charge until PS-445 voltage (under charge) reaches 4.8 to 5.0 volts at 68°F (20°C). Hold at 4.8 to 5.0 volts until current drops to under 45mA. Battery is fully charged under these conditions, and charger should be disconnected or switched to “float” voltage.

“Float” or “Stand-By” Service: Hold battery across constant voltage source of 4.5 to 4.6 volts continuously. When held at this voltage, the battery will seek its own current level and maintain itself in a fully charged condition.

Note: Due to the self-discharge characteristics of the 4V 4.5AH battery, it is imperative that they be charged within 6 months of storage, otherwise permanent
loss of capacity might occur as a result of sulfation