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 5 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 4.0Ah is the cheapest of the three today, at £57.95.
Price per Ah5.0Ah £11.99, 4.0Ah £14.49, 3.0Ah £21.65.
Good to know
Same toolsAll three fit every Milwaukee M18 tool.
Weight0.7kg: too close to call.
Same chargersM12-18FC, M18DFC, M18PC6, M18DBSC, M18MDBSC, M18MPC6, M12-18GBC4, M18TC, M1418C6, M1418C6-110V and M12-18AC charge all three. Charge times are in the specs below.
Energy
M18HB3
54Wh
M18B4
72Wh
M18B5
90Wh
Maker figure, or volts × Ah where they don't publish one. Ah and Wh explained ›
Weight
M18HB3
0.7kg
M18B4
0.7kg
M18B5
0.7kg
Within 0.1kg: too close to call.
Price per Ah
M18HB3
£21.65
M18B4
£14.49
M18B5
£11.99
Lowest price we track ÷ Ah. Full specs
M18HB3M18B4M18B5
Voltage18V18V18V
Capacity3.0Ah4.0Ah5.0Ah
Energy54Wh72Wh90Wh
Weight0.7kg0.7kg0.7kg
Energy for its weight77Wh/kg (worked out)103Wh/kg (worked out)129Wh/kg (worked out)
ChemistryLi-ion (cylindrical)Li-ion (cylindrical)Li-ion (cylindrical)
Cell typeNot listedNot listedNot listed
Fuel gaugeYesYesYes
Size (L × W × H)Not listedNot listedNot listed
Charge time, M12-18FC, M18DFC, M18PC6, M18DBSC, M18MDBSC, M18MPC6, M12-18GBC436 min52 min59 min
Charge time, M18TC1 hr 5 min1 hr 20 min1 hr 45 min
Charge time, M1418C6, M1418C6-110V1 hr 10 min1 hr 20 min1 hr 40 min
Charge time, M12-18AC1 hr 15 min1 hr 20 min1 hr 40 min
Lowest price£64.95£57.95£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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