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Schumacher SP3 3 Amp Automatic Battery Extender / Maintainer

4.6 out of 5 stars 151 customer reviews

Price: $34.18 & FREE Shipping. Details
In Stock.
Ships from and sold by Amazon.com. Gift-wrap available.
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  • The product is 3A Auto Battery Charger
  • Easy to use
  • The product is manufactured in China
  • For use with 6 and 12 Volts batteries
  • Scrolling digital messaging displays step by step instructions to properly charge your battery
  • Auto voltage detection automatically detects 6 or 12 Volts batteries
  • Hook attachment allows the unit to hang outside the work area for safety and convenience
  • It includes 50 ampere quick connect clamps, 24 inch fused ring leads harness with weather cap, 12 Volts DC adapter and manual
25 new from $34.18

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$34.18 & FREE Shipping. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently bought together

  • Schumacher SP3 3 Amp Automatic Battery Extender / Maintainer
  • +
  • Schumacher EC-25 25' Cable Connector Extension Cord
  • +
  • Schumacher WM-12 Cable Connector for Battery Charger/Maintainer
Total price: $48.42
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Customer Rating 4 out of 5 stars (151) 4 out of 5 stars (1456) 4 out of 5 stars (630) 4 out of 5 stars (2630) 4 out of 5 stars (7098) 4 out of 5 stars (64)
Price $34.18 $29.94 $19.84 $19.90 $24.45 $34.89
Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping
Sold By Amazon.com Amazon.com Amazon.com Amazon.com Amazon.com Amazon.com
Item Dimensions 3.5 x 7.75 x 2.62 in 7.5 x 7 x 11 in 8 x 2 x 9 in 3 x 5 x 9.75 in 4 x 8 x 9 in 6.25 x 3.25 x 2.75 in


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Product description

This battery extender / maintainer is ideal for maintaining stored, power sport and automotive batteries for cars, motorcycles, ATV's, RV's, boats and classic cars. The 3 ampere battery charger / maintainer automatically detects 6 or 12 Volts batteries and features multi-stage charging for added precision, safety and battery life. Float mode monitoring automatically maintains optimum battery charge while the reverse hook-up protection helps protect the battery and charger from damage. The easy to read, animated display gives you step by step instructions to properly charge your battery. Includes 50 ampere quick connect clamps, 24 inch fused ring leads harness with weather cap, 12 Volts DC adapter and a hook attachment that allows the unit to hang outside the work area for safety and convenience.


From the manufacturer

SE-1-12S-CA SP2 SP1 SP3
Charge Rate 1.5Amp 1Amp 2Amp 3Amp
Charging Voltage 12V 6/12V 6/12V 6/12V
8 Phase Multi-Stage Charging
Reverse Connection Protection
AGM & Standard Battery Capable
Desulfation Mode
Temperature Compensation Charging
Battery Clamps Included
Ring Connectors Included
12V Port Adapter Included

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