Both the batteries of BATOCA S2 & BATOCA S4 are mutually compatible. By switching different shafts, you will get R otary polisher, 3mm and 12mm Random Orbital polisher. Brushless motor does not need to replace carbon brushes, no spark, no noise.

Battery Using Time: 1 Hour
Action: Dual Action & Rotary
Power Source: Battery
Soft Start: Yes
Size: Mini
Feature 1: Quick-change backing plate
Feature 3: Smaller Polishing pads polish the dead center of your car
Feature 2: BATOCA S2 and S4 batteries can be shared
MPN: B02PO55-2-US-J-KIT
Unit Type: Unit
Manufacturer Warranty: 10 Years
Voltage: 12 V
Battery: 2 x 2.5 Ah 12 V Li-ion Batteries
Unit Quantity: 38
Battery Charging Voltage: 110 V
Battery Charging Time: 1 Hour Fast Charging
Battery Technology: Lithium-Ion (Li-Ion)
Number of Battery: 2 Pack
Orbit: 3 mm, 12 mm
Battery Included: Yes
Color: Green
Item Diameter: 1 inch, 3 inch
Pad Diameter: 1 inch ( 25 mm ) & 3 inch ( 75 mm )
Variable Speed: 4 Speeds
No-load Speed: 2000-5500 RPM
Material: ABS, Metal
Brand: BATOCA
Charger Plug Type: US Plug
Type: Buffer & Polisher
Battery Capacity: 2.5 Ah
Disc Diameter: 1 in, 3 in
Model: BATOCA S4 Cordless Car Polisher Orbital Rotary Machine
Country/Region of Manufacture: China
Power: 30 W
Item Weight: 5.27 lbs