3.0Ah vs 4.0Ah vs 5.0Ah
Same fit: these run the same tools
Lowest price we track at UK retailers, updated daily. We may earn a commission
They differ in 3 of 6 areas
Same tools, so this is about size, weight and cost. No overall winner: pick the size that suits the job.
EnergyThe 5.0Ah stores 67% more than the 3.0Ah: 90Wh vs 54Wh.
PriceThe 3.0Ah is the cheapest of the three today, at £59.95.
Price per Ah5.0Ah £11.99, 4.0Ah £17.49, 3.0Ah £19.98.
Good to know
Same toolsAll three fit every Makita 18V LXT tool, and pair up on the Makita 18V Twin (36V) tools.
Weight0.63 to 0.64kg: too close to call.
Same chargersDC18RC, DC18RC/1, DC18RD, DC18RD/1, DC18SD and DC18SH charge all three. Charge times are in the specs below.
Energy
BL1830B
54Wh
BL1840B
72Wh
BL1850B
90Wh
Maker figure, or volts × Ah where they don't publish one. Ah and Wh explained ›
Weight
BL1830B
0.64kg
BL1840B
0.64kg
BL1850B
0.63kg
Within 0.1kg: too close to call.
Price per Ah
BL1830B
£19.98
BL1840B
£17.49
BL1850B
£11.99
Lowest price we track ÷ Ah. Full specs
BL1830BBL1840BBL1850B
Voltage18V18V18V
Capacity3.0Ah4.0Ah5.0Ah
Energy54Wh72Wh90Wh
Weight0.64kg0.64kg0.63kg
Energy for its weight84Wh/kg (worked out)113Wh/kg (worked out)143Wh/kg (worked out)
ChemistryLi-ion (cylindrical)Li-ion (cylindrical)Li-ion (cylindrical)
Cell typeNot listedNot listedNot listed
Fuel gaugeYesYesYes
Size (L × W × H)113 × 75 × 62 mm113 × 75 × 62 mm113 × 75 × 62 mm
Charge time, DC18RC, DC18RC/1, DC18RD, DC18RD/122 min36 min45 min
Charge time, DC18SD, DC18SH1 hr1 hr 30 min1 hr 50 min
Lowest price£59.95£69.95£59.95
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.
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