4.0Ah vs 5.0Ah vs 5.5Ah
Same fit: these run the same tools
BOSCH 18V PROFESSIONAL
GBA18V-50
5.0Ah · 90Wh · 0.62kg
£85.00from 3 retailers
View at Machine Mart ›
Lowest price we track at UK retailers, updated daily. We may earn a commission
They differ in 3 of 4 areas
Same tools, so this is about size, weight and cost. No overall winner: pick the size that suits the job.
EnergyThe 5.5Ah stores 38% more than the 4.0Ah: 99Wh vs 72Wh.
WeightThe 4.0Ah is the lightest at 0.61kg, the 5.5Ah the heaviest at 1.02kg.
Size4.0Ah 121 × 80 × 51mm; 5.0Ah 114 × 74 × 56mm; 5.5Ah 121 × 80 × 73mm (L × W × H).
Good to know
Same toolsAll three fit every Bosch 18V Professional tool.
Energy
EXBA18V-40
72Wh
GBA18V-50
90Wh
EXBA18V-55
99Wh
Maker figure, or volts × Ah where they don't publish one. Ah and Wh explained ›
Weight
EXBA18V-40
0.61kg
GBA18V-50
0.62kg
EXBA18V-55
1.02kg
Price per Ah
EXBA18V-40
No price yet
GBA18V-50
£17.00
EXBA18V-55
£28.72
Lowest price we track ÷ Ah. Full specs
EXBA18V-40GBA18V-50EXBA18V-55
Voltage18V18V18V
Capacity4.0Ah5.0Ah5.5Ah
Energy72Wh90Wh99Wh
Weight0.61kg0.62kg1.02kg
Energy for its weight119Wh/kg (worked out)145Wh/kg (worked out)97Wh/kg (worked out)
ChemistryLi-ion (cylindrical)Li-ion (cylindrical)Li-ion (cylindrical)
Cell typeNot listedNot listedNot listed
Fuel gaugeYesYesYes
Size (L × W × H)121 × 80 × 51 mm114 × 74 × 56 mm121 × 80 × 73 mm
Lowest priceNo retailer price yet£85.00£157.95
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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