Product Description
The Briggs & Stratton 84004958 InStart iSi Battery is a genuine replacement power unit designed for Briggs & Stratton iSi (InStart) engines, delivering reliable electric starting performance. Engineered for durability and compatibility, it supports a wide range of modern lawnmower fitted InStart iSi integral battery series engines.
Key Features
- Genuine Briggs & Stratton part – ensures perfect fit and optimal performance
- Compatible with InStart engine series – 475iSi, 575iSi and 675iSi
- Reliable instant starting – maintains strong, consistent power delivery for effortless starting
- Replaces part number – 84002154
- Integral battery design
Why Choose This Battery?
This genuine Briggs & Stratton battery is the ideal solution for restoring full starting performance to your InStart iSi series engine. Whether your current battery is failing, holding charge poorly, or has reached the end of its service life, the 84004958 ensures:
- Perfect compatibility
- Long-term reliability
- Safe operation
- Guaranteed fit for iSi series InStart engines
Ideal For
Homeowners, gardeners, and professionals using Briggs & Stratton InStart iSi-equipped lawnmowers who need a reliable, genuine replacement battery.
Charging Compatibility
This battery works with the official Briggs & Stratton InStart iSi chargers:
- 84002791 – UK 3-Pin Plug Charger
- 84002792 – EU 2-Pin Plug Charger
Need Help Choosing the Right Part?
Briggsbits offers expert advice, interactive parts diagrams, and fast UK delivery to make sure you get the correct battery for your engine the first time.
PLEASE NOTE: Attempting to fit the incorrect part can have a dramatic affect on how your engine runs, it also risks causing damage to either the part, or the engine. If you're not sure of the exact part number for your engine, refer to the parts list specific to your engines Model, Type and Code numbers, or contact us for assistance.
PLEASE NOTE - Due to airmail restrictions, we can only supply these batteries within mainland UK.
01747 356048
