3.5Ah 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 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 43% more than the 3.5Ah: 90Wh vs 63Wh.
PriceThe 4.0Ah is the cheapest of the three today, at £49.95.
Price per Ah5.0Ah £11.99, 4.0Ah £12.49, 3.5Ah £28.56.
Chemistry3.5Ah: Li-ion pouch (POWERSTACK); 4.0Ah: Li-ion (cylindrical); 5.0Ah: Li-ion (cylindrical).
Good to know
Same toolsAll three fit every DeWalt 18V XR tool.
Weight0.58 to 0.62kg: too close to call.
Energy
DCBP318
63Wh
DCB182
72Wh
DCB184
90Wh
Maker figure, or volts × Ah where they don't publish one. Ah and Wh explained ›
Weight
DCBP318
0.58kg
DCB182
0.61kg
DCB184
0.62kg
Within 0.1kg: too close to call.
Price per Ah
DCBP318
£28.56
DCB182
£12.49
DCB184
£11.99
Lowest price we track ÷ Ah. Full specs
DCBP318DCB182DCB184
Voltage18V18V18V
Capacity3.5Ah4.0Ah5.0Ah
Energy63Wh72Wh90Wh
Weight0.58kg0.61kg0.62kg
Energy for its weight109Wh/kg (worked out)118Wh/kg (worked out)145Wh/kg (worked out)
ChemistryLi-ion pouch (POWERSTACK)Li-ion (cylindrical)Li-ion (cylindrical)
Cell typePouch (stacked)Not listedNot listed
Fuel gaugeYesYesYes
Size (L × W × H)Not listedNot listedNot listed
Lowest price£99.95£49.95£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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