Specs from the makers' own documentation Battery compatibility built in UK retailer prices, updated daily 25+ years of trade experience
Battery comparison
3 of 3 batteries

BSL36A18 vs BSL36A18X vs BSL3640MVT

Same fit: these run the same tools
HIKOKI MULTIVOLT 36V
5.0Ah BSL36A18 5.0Ah · 90Wh · 0.7kg
No retailer price yet
HIKOKI MULTIVOLT 36V
5.0Ah BSL36A18X 5.0Ah · 90Wh · 0.74kg
No retailer price yet
HIKOKI MULTIVOLT 36V
8.0Ah BSL3640MVT 8.0Ah · 144Wh · 0.98kg
No retailer price yet

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 BSL3640MVT stores 60% more than the BSL36A18: 144Wh vs 90Wh.
WeightThe BSL36A18 is the lightest at 0.7kg, the BSL3640MVT the heaviest at 0.98kg.
SizeBSL36A18 116 × 76 × 69mm; BSL36A18X 118 × 80 × 71mm; BSL3640MVT 134 × 83 × 77mm (L × W × H).

Good to know

Same toolsAll three fit every HiKOKI MultiVolt 36V tool.
Same chargersUC36YSL2, UC18YSL3 and UC18YKSL charge all three. Charge times are in the specs below.
Energy
BSL36A18 90Wh
BSL36A18X 90Wh
BSL3640MVT 144Wh
Maker figure, or volts × Ah where they don't publish one. Ah and Wh explained ›
Weight
BSL36A18 0.7kg
BSL36A18X 0.74kg
BSL3640MVT 0.98kg

Full specs

BSL36A18BSL36A18XBSL3640MVT
Voltage18V/36V18V/36V18V/36V
Capacity5.0Ah5.0Ah8.0Ah
Energy90Wh90Wh (worked out)144Wh (worked out)
Weight0.7kg0.74kg0.98kg
Energy for its weight129Wh/kg (worked out)122Wh/kg (worked out)147Wh/kg (worked out)
ChemistryLi-ion (cylindrical)Li-ion (cylindrical)Li-ion (cylindrical)
Cell typeNot listed18650 cylindrical21700 tabless
Fuel gaugeYesYesYes
Size (L × W × H)116 × 76 × 69 mm118 × 80 × 71 mm134 × 83 × 77 mm
Charge time, UC36YSL225 min25 min40 min
Charge time, UC18YSL332 min32 min52 min
Charge time, UC18YKSL2 hr 30 min2 hr 30 min4 hr
Lowest priceNo retailer price yetNo retailer price yetNo retailer price yet

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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