2.0Ah vs 3.0Ah vs 4.0Ah
Same fit: these run the same tools
Lowest price we track at UK retailers, updated daily. We may earn a commission
They differ in 4 of 5 areas
Same tools, so this is about size, weight and cost. No overall winner: pick the size that suits the job.
EnergyThe 4.0Ah stores 100% more than the 2.0Ah: 72Wh vs 36Wh.
WeightThe 2.0Ah is the lightest at 0.4kg, the 3.0Ah the heaviest at 0.7kg.
PriceThe 2.0Ah is the cheapest of the three today, at £56.95.
Price per Ah4.0Ah £14.49, 3.0Ah £21.65, 2.0Ah £28.48.
Good to know
Same toolsAll three fit every Milwaukee M18 tool.
Same chargersM12-18FC, M18DFC, M18PC6, M18DBSC, M18MDBSC, M18MPC6, M12-18GBC4, M12-18AC, M1418C6, M1418C6-110V and M18TC charge all three. Charge times are in the specs below.
Energy
M18B2
36Wh
M18HB3
54Wh
M18B4
72Wh
Maker figure, or volts × Ah where they don't publish one. Ah and Wh explained ›
Weight
M18B2
0.4kg
M18HB3
0.7kg
M18B4
0.7kg
Price per Ah
M18B2
£28.48
M18HB3
£21.65
M18B4
£14.49
Lowest price we track ÷ Ah. Full specs
M18B2M18HB3M18B4
Voltage18V18V18V
Capacity2.0Ah3.0Ah4.0Ah
Energy36Wh54Wh72Wh
Weight0.4kg0.7kg0.7kg
Energy for its weight90Wh/kg (worked out)77Wh/kg (worked out)103Wh/kg (worked out)
ChemistryLi-ion (cylindrical)Li-ion (cylindrical)Li-ion (cylindrical)
Cell typeNot listedNot listedNot listed
Fuel gaugeNot listedYesYes
Size (L × W × H)Not listedNot listedNot listed
Charge time, M12-18FC, M18DFC, M18PC6, M18DBSC, M18MDBSC, M18MPC6, M12-18GBC426 min36 min52 min
Charge time, M12-18AC40 min1 hr 15 min1 hr 20 min
Charge time, M1418C6, M1418C6-110V40 min1 hr 10 min1 hr 20 min
Charge time, M18TC42 min1 hr 5 min1 hr 20 min
Lowest price£56.95£64.95£57.95
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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