Makita BL4050F 40V MAX XGT Lithium-Ion 5.0Ah

Makita BL4050F 40V max XGT Lithium‑Ion 5.0Ah Battery

The BL4050F is a high-capacity XGT pack built for sustained power and runtime on demanding 40V max and 80V max (two‑battery) Makita XGT tools. It pairs with Makita’s Rapid Optimum Charger to minimize downtime while protecting cells under tough use.

Key specs

Platform	Makita XGT 40V max (36V nominal)
Capacity	5.0Ah
Energy	~180 Wh (36V × 5.0Ah)
Typical charge time	~50 minutes with DC40RA Rapid Optimum Charger
Indicators	Built‑in 4‑LED fuel gauge
Protection	Tool–battery digital communication; overload, overheat, and over‑discharge protection
Compatibility	All 40V max XGT tools; serves as one of two batteries on 80V max XGT tools
Warranty	3‑year limited (check Makita for terms)

When to choose it

• High‑draw tools (e.g., 7‑1/4 in. circular saws, grinders, SDS‑Plus/Max rotary hammers, large blowers).
• Extended runtime with fewer battery swaps on jobsites.
• 80V max XGT equipment that requires two packs (use two BL4050F for balanced performance).

Consider alternatives

• BL4025 (2.5Ah): Lightest feel and fastest charging for repetitive overhead work or service tasks.
• BL4040 (4.0Ah): Balanced weight/runtime for general carpentry and MEP trades.
• BL4080F (8.0Ah): Maximum runtime for stationary or high‑duty cycles; heavier and longer to charge.

Runtime planning (estimates)

Energy available is about 180 Wh. Divide by your tool’s average power draw to estimate trigger time. Actual runtime varies with material, blade/bit condition, and technique.

Tool / Load	Typical draw	Est. trigger time
7‑1/4 in. circular saw (moderate rip cuts)	700–900 W	12–15 minutes
Reciprocating saw (demolition)	600–800 W	13–18 minutes
Mid‑torque impact wrench	300–500 W	20–36 minutes
LED work light	10–20 W	9–18 hours

Charging and care

• Use DC40RA (single‑port) or compatible XGT chargers for fastest results; allow the pack to cool to room temperature before charging.
• Ideal charging environment: 50–86°F (10–30°C). Avoid charging below 32°F (0°C) or above 104°F (40°C).
• Keep terminals clean and dry; inspect the case for cracks or damage before use.
• Long‑term storage: 30–60% charge, cool/dry place; top up every 3–6 months.
• Rotate two packs to maintain continuous workflow on high‑demand tasks.

Compatibility notes

• Fits all Makita XGT 40V max tools directly; required as a pair on 80V max XGT tools.
• Not compatible with Makita LXT (18V) or CXT (12V) tools, and adapters are not recommended.

Pros and cons

• Pros: Long runtime, robust protection electronics, fast ~50‑minute charge, on‑pack fuel gauge.
• Cons: Heavier than lower‑capacity packs; longer charge time versus 2.5Ah/4.0Ah batteries.

FAQ

• Will it work with my 18V LXT tools? No. XGT and LXT are separate platforms.
• How many batteries do 80V max XGT tools need? Two XGT packs (e.g., two BL4050F) used simultaneously.
• Can I leave the battery on the charger? Makita chargers switch to maintenance mode when full, but for best longevity store the pack off the charger in a cool, dry place.
• Does cold weather reduce runtime? Yes. Keep batteries warm before use and avoid charging below 32°F (0°C).
• What does the “F” indicate? This model includes a built‑in fuel gauge (4‑LED charge indicator).