4.0Ah vs 5.0Ah vs 8.0Ah
Same fit: these run the same tools
Lowest price we track at UK retailers, updated daily. We may earn a commission
They differ in 5 of 6 areas
Same tools, so this is about size, weight and cost. No overall winner: pick the size that suits the job.
EnergyThe 8.0Ah stores 100% more than the 4.0Ah: 288Wh vs 144Wh.
WeightThe 4.0Ah is the lightest at 0.94kg, the 8.0Ah the heaviest at 1.9kg.
PriceThe 4.0Ah is the cheapest of the three today, at £189.95.
Price per Ah8.0Ah £36.24, 5.0Ah £42.99, 4.0Ah £47.49.
Size4.0Ah 133 × 82 × 71mm; 5.0Ah 152 × 79 × 75mm; 8.0Ah 152 × 85 × 94mm (L × W × H).
Good to know
Same toolsAll three fit every Makita 40V XGT tool, and pair up on the Makita 80V XGT tools.
Same chargers191E08-6, 191N22-6, 191N14-5, 191N07-2, 191M92-9, 191M89-8 and DC40WA charge all three. Charge times are in the specs below.
Energy
BL4040F
144Wh
BL4050F
180Wh
BL4080F
288Wh
Maker figure, or volts × Ah where they don't publish one. Ah and Wh explained ›
Weight
BL4040F
0.94kg
BL4050F
1.3kg
BL4080F
1.9kg
Price per Ah
BL4040F
£47.49
BL4050F
£42.99
BL4080F
£36.24
Lowest price we track ÷ Ah. Full specs
BL4040FBL4050FBL4080F
Voltage40V max (36V nom)40V max (36V nom)40V max (36V nom)
Capacity4.0Ah5.0Ah8.0Ah
Energy144Wh180Wh288Wh
Weight0.94kg1.3kg1.9kg
Energy for its weight153Wh/kg (worked out)138Wh/kg (worked out)152Wh/kg (worked out)
ChemistryLi-ion (cylindrical)Li-ion (cylindrical)Li-ion (cylindrical)
Cell type21700 tablessNot listedNot listed
Fuel gaugeYesYesYes
Size (L × W × H)133 × 82 × 71 mm152 × 79 × 75 mm152 × 85 × 94 mm
Charge time, 191E08-6, 191N22-6, 191N14-5, 191N07-245 min50 min1 hr 16 min
Charge time, 191M92-9, 191M89-81 hr 7 min1 hr 25 min2 hr 50 min
Charge time, DC40WA3 hr 30 min4 hr 20 min7 hr
Lowest price£189.95£214.95£289.95
Specs from each maker's own documentation. "Not listed" means the maker doesn't publish it or we haven't found it yet; it never counts as a difference.
Battery guides
Not sure what the numbers mean, or which platform to buy into? Start here.
Power Tool Battery Ah and Wh ExplainedEvery battery gives an "Ah" number: 2.0Ah, 5.0Ah, 8.0Ah. People treat it like a power rating, buy the biggest one they can,…5 Min Read min read ›
Cordless Battery Platforms Explained: Which Should You Buy Into?Here is the thing no one tells you when you buy your first power tool: you are not really choosing a tool.…8 min read min read ›
Corded vs Cordless Power Tools: Which to Buy?Cordless has taken over site and workshop, and for good reason, but corded tools are not dead, and for some jobs they…5 min read min read ›