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 5 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: 60Wh vs 36Wh.
WeightThe 3.0Ah is the lightest at 0.2kg, the 5.0Ah the heaviest at 0.42kg.
PriceThe 3.0Ah is the cheapest of the three today, at £29.95.
Price per Ah3.0Ah £9.98, 4.0Ah £9.99, 5.0Ah £11.99.
Chemistry3.0Ah: Li-ion; 4.0Ah: Li-ion (cylindrical); 5.0Ah: Li-ion.
Good to know
Same toolsAll three fit every Milwaukee M12 tool.
Same chargersM12-18FC, M12-18GBC4, C12C, M12C4 and M12-18AC charge all three. Charge times are in the specs below.
Energy
M12B3
36Wh
M12B4
48Wh
M12HB5
60Wh
Maker figure, or volts × Ah where they don't publish one. Ah and Wh explained ›
Weight
M12B3
0.2kg
M12B4
0.4kg
M12HB5
0.42kg
Price per Ah
M12B3
£9.98
M12B4
£9.99
M12HB5
£11.99
Lowest price we track ÷ Ah. Full specs
M12B3M12B4M12HB5
Voltage12V12V12V
Capacity3.0Ah4.0Ah5.0Ah
Energy36Wh48Wh60Wh
Weight0.2kg0.4kg0.42kg
Energy for its weight180Wh/kg (worked out)120Wh/kg (worked out)143Wh/kg (worked out)
ChemistryLi-ionLi-ion (cylindrical)Li-ion
Cell typeNot listedNot listedNot listed
Fuel gaugeYesYesNot listed
Size (L × W × H)Not listedNot listedNot listed
Charge time, M12-18FC, M12-18GBC450 min52 min1 hr 15 min
Charge time, C12C, M12C41 hr 10 min1 hr 20 min1 hr 50 min
Charge time, M12-18AC1 hr 30 min1 hr 55 min1 hr 50 min
Lowest price£29.95£39.95£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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