Since 1947, Schumacher Electric Corporation has been leading change and driving performance to exceed its customers’ expectations. Engineered patent-pending technologies and award-winning marketing makes Schumacher the brand of choice. Schumacher’s legacy is its commitment to quality and exceptional customer service. Schumacher brings experience, innovation and excellence to the next generation of battery maintenance... the #1 name in battery chargers around the world.

The SPI3 by Schumacher is the ideal charging/maintaining solution for all power sport, car & boat batteries. The charger monitors and maintains the battery when fully charged and then resumes continous charging when the battery becomes discharged. It is suitable for lithium LiFeP04, AGM, standard and gel cell batteries. The SPI3 is the next generation in lithium-ion technology.


  • Hook attachment that allows the SPI2 to hang outside the work area for safety and convenience. 
  • Float-mode monitoring that automatically maintains optimum battery charge. 
  • Reverse hook-up protection that helps protect the battery and charger from damage.
  • Microprocessor controlled - Multi-stage charging for added precision, safety and battery life.

Multi-Stage Charging
           1. Recover
           2. Auto-voltage detection
           3. Soft Start
           4. Bulk mode
           5. Absorption
           6. Monitoring 
           7. Float mode
           8. Maintain 

Specification Value
Colours Red & Black
Reverse Hook-up Protection Yes
Amperage 3A, Microproccessor Controlled
Float Mode Monitoring Yes
Input 120V AC, 60Hz, 0.5A
Box Contents SP1A, Clamp Adaptor, Fuse Ring Leads, Manual
Dimensions 140 x 90 x 45mm
Output 1A @ 6V/12V DC
Hook Attachement Yes
Battery Types AGM, Standard, Gel Cell, Calcium, Start Stop, 4 cell LITHIUM LiFeP04
IP Rating  IP64
Warranty 2 Years
Brand Schumacher

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