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Greenworks BAF704 40V 4.0Ah Lithium Ion Battery with USB, 4Ah, Black/Green

TLDR Review: Greenworks 40V 4Ah Battery

By ShopSavvy Team

Published: June 13th, 2026

Pros

•Lonasting battery with good power output over extended use
•Reliable performance when paired with Greenworks outdoor equipment
•Durable design with only two replacements needed over 8 years
•Provides consistent, powerful performance for effective mowing
•Versatile use with other Greenworks tools like trimmers, edgers, and blowers
•Arrived in good condition and correctly matched upon delivery
•Standard initial charge required after receipt
•High quality build, offering good value for outdoor maintenance
•Design supports maintaining a strong charge for longer yard work sessions
•Suitable for users prioritizing performance and durability

Cons

•Some users experienced issues with battery failing to hold a charge or appearing defective
•Only compatible with Greenworks chargers; noreenworks chargers may cause charging problems
•Inconsistencies observed with the presence of USB port feature in some models
•Occasional trouble with charging or reconditioning, sometimes necessitating returns or replacements
•Does not support charging phones or tablets via USB despite product name suggesting USB functionality
•Received batteries lacking expected features or with incorrect model issues
•Relatively high price point at over $330 may deter potential buyers
•Proper charging habits recommended for lonerm battery health
•Limited information on battery's weight or dimensions, impacting portability considerations
•Perception among some users that manufacturer prioritizes profit over comprehensive features

Bottom Line

Based on user feedback, the Greenworks BAF704 40V 4.0Ah Lithium Ion Battery is a durable and reliable option for existing Greenworks users. However, be aware of potential charging issues and model discrepancies. If versatility and long-term outdoor power are priorities, this battery is a solid choice, but consider looking into newer models or bundles with additional batteries for extended runtime. Carefully evaluate compatibility and cost before purchasing.

How we researched this

About this review: We pulled together findings from professional reviews and hundreds of user reviews, and cross-referenced them with ShopSavvy's pricing data from 1 retailers to give you the short version.

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