Husqvarna Cordless Power Tools BLi300 40V Li-Ion Professional 9 Ah Battery 967964302

What It Is

The Husqvarna BLi300 is a 40V, 9 Ah lithium-ion professional-grade battery designed to power Husqvarna cordless lawn mowers, trimmers, blowers, chainsaws, and other 40V tools in the Husqvarna battery platform. It’s intended for high-drain, extended-use applications like large lawns or heavy brush clearing.

Fitment & Compatibility

Critical fit check: This battery only fits Husqvarna 40V tools (not 36V, 56V, or 80V systems). It is compatible with all Husqvarna 40V cordless mowers (e.g., LC 140P, LC 247i), trimmers (e.g., 520iHD60S), blowers, and chainsaws. It will not work with non-Husqvarna brands or older 36V models. Before buying: Verify your tool’s voltage requirement is 40V and that the battery slot is designed for the BLi300’s shape (rectangular with a top-mounted latch). Measure the battery compartment dimensions—9 Ah packs are physically larger than 4 Ah or 6 Ah units, so check clearance if your mower has a covered battery tray. OEM only—no reliable aftermarket equivalents exist for this specific model.

Key Things to Know

• Quality: Professional-grade with high discharge rate and robust casing; 3.8/5 rating reflects occasional reports of premature capacity loss in hot climates. Not for casual light use.
• Installation: Tool-free—slides in and clicks; no adapter needed. Charge time with QC330 charger is about 60 minutes for full capacity.
• Common gotchas: This battery is heavy (approx. 3.5 lbs)—may unbalance lighter tools like trimmers. Do not store fully discharged; use a Husqvarna charger to avoid cell imbalance. Warranty is 2 years, but only if registered within 30 days of purchase.
• Performance: 9 Ah gives up to 2x runtime vs. 4.5 Ah packs; ideal for mowing 1/2+ acre on a single charge with a 40V mower.

Should You Buy It

Buy this if you own multiple Husqvarna 40V tools and need maximum runtime for large jobs (e.g., mowing 1/2+ acre, heavy trimming). Skip it if you have a single small tool or only need occasional light use—a 6 Ah or 4.5 Ah battery will save weight and cost.