Generac 10000020303 12V Lithium-Ion Battery Assembly – Genuine OEM Replacement Power Washer Battery
Part Number: 10000020303
Category: Pressure Washer Parts → Electrical Components → Rechargeable Battery Assemblies
Type: Generac 10000020303 12V Lithium-Ion Battery Assembly – Genuine OEM Replacement Power Washer Battery
The Generac 10000020303 12V Lithium-Ion Battery Assembly is a genuine OEM replacement rechargeable battery designed for compatible Generac OneWash™ electric-start pressure washers. This 12-volt lithium-ion battery powers the electric start system, providing reliable engine starting performance while eliminating the need for repeated pull starts. Manufactured to original equipment specifications, it provides a direct-fit replacement for weak, damaged, or worn batteries and helps restore dependable starting performance. It is compatible with the Generac 10000020284 battery charger, which is sold separately.
Key Features & Benefits
- Part Number: 10000020303
- Genuine OEM Generac replacement part
- 12-volt rechargeable lithium-ion battery assembly
- Designed for compatible Generac OneWash™ pressure washers
- Provides reliable electric-start performance
- Lightweight lithium-ion design
- Direct-fit OEM replacement
- Compatible with Generac Charger Part No. 10000020284 (sold separately)
Technical Specifications
Part Number: 10000020303
Manufacturer: Generac
Product Type: Lithium-Ion Battery Assembly
Battery Voltage: 12 Volts
Battery Chemistry: Lithium-Ion
Application: Electric-Start Pressure Washer
OEM Part: Yes
Quantity: Sold Individually
Compatible Applications
The Generac 10000020303 Battery Assembly fits compatible Generac OneWash™ electric-start pressure washers, including models such as:
Generac
- OneWash™ 3100 PSI Electric Start
- OneWash™ 3300 PSI Electric Start
- 7132 (and other compatible OneWash electric-start models)
Always verify your pressure washer model and original part number before ordering to ensure proper compatibility.
Function of the Battery Assembly
The 10000020303 Battery Assembly is designed to:
- Supply power to the electric-start system
- Provide dependable engine starting performance
- Eliminate the need for repeated manual pull starts
- Deliver consistent starting power between charges
- Restore the factory battery system
- Support reliable operation of compatible Generac pressure washers
Common Signs Replacement Is Needed
Replace the battery assembly if you notice:
- Battery no longer holds a charge
- Slow or unreliable electric starting
- Battery fails to recharge properly
- Reduced runtime between charges
- Physical swelling or damage to the battery pack
- Battery has reached the end of its service life
A weakened lithium-ion battery can cause unreliable starting and may eventually prevent the pressure washer from using its electric-start feature.
Installation & Service Notes
Turn the pressure washer off and allow the engine to cool before servicing the battery.
Remove the discharged 10000020303 Battery Assembly from its compartment according to the equipment owner's manual. Inspect the battery contacts and connector for dirt, corrosion, or damage before installing the replacement battery. Insert the new battery until it is fully seated and verify that it locks securely into place. Fully charge the battery with the compatible Generac 10000020284 Charger before first use to maximize performance and battery life.
Important: Always verify your pressure washer model and original part number before ordering. Use only compatible Generac lithium-ion chargers designed for this battery assembly.
Maintenance Recommendations
- Recharge the battery after each use.
- Store the battery in a cool, dry location away from direct sunlight.
- Avoid storing the battery in a fully discharged state.
- Keep battery contacts clean and free of moisture or debris.
- Use only compatible Generac chargers for charging.
- Use genuine OEM replacement parts to maintain factory fit, reliable starting performance, and long-term pressure washer operation.
