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 4 of 4 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.
WeightThe 3.0Ah is the lightest at 0.4kg, the 5.0Ah the heaviest at 0.7kg.
Cells3.0Ah: 18650 cylindrical; 4.0Ah: 21700 cylindrical; 5.0Ah: 18650 cylindrical.
Chemistry3.0Ah: Li-ion (cylindrical); 4.0Ah: Li-ion; 5.0Ah: Li-ion (cylindrical).
Good to know
Same toolsAll three fit every Festool 18V tool, and pair up on the Festool 18V Twin (36V) tools.
Same chargers201136 and 577019 charge all three. Charge times are in the specs below.
Energy
BP18Li3.0C
54Wh
BP18Li4.0HPC
72Wh
BP18Li5.0
90Wh
Maker figure, or volts × Ah where they don't publish one. Ah and Wh explained ›
Weight
BP18Li3.0C
0.4kg
BP18Li4.0HPC
0.6kg
BP18Li5.0
0.7kg
Price per Ah
BP18Li3.0C
No price yet
BP18Li4.0HPC
£38.99
BP18Li5.0
£34.59
Lowest price we track ÷ Ah. Full specs
BP18Li3.0CBP18Li4.0HPCBP18Li5.0
Voltage18V18V18V
Capacity3.0Ah4.0Ah5.0Ah
Energy54Wh72Wh90Wh
Weight0.4kg0.6kg0.7kg
Energy for its weight135Wh/kg (worked out)120Wh/kg (worked out)129Wh/kg (worked out)
ChemistryLi-ion (cylindrical)Li-ionLi-ion (cylindrical)
Cell type18650 cylindrical21700 cylindrical18650 cylindrical
Fuel gaugeYesYesYes
Size (L × W × H)Not listedNot listedNot listed
Charge time, 201136, 57701933 min32 min45 min
Lowest priceNo retailer price yet£155.95£172.95
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
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