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Dyson V8 Absolute review: finally a cordless alternative to an upright | Technology | The Guardian
V8 will last for 40 minutes without a powered head, using the crevice tool or similar suction-only accessory. It will last up to 30 minutes with the fluffy head attached, up to 25 minutes with the traditional spinning brush head or seven minutes when in maximum suction mode.
Tests New vac 2.8 Ah runs 8.5 min. on Max w/ motorized head 5:10 to charge Old battery 4 year old runs 30 sec. on Max 40 min to charge Briswaye 3.5 Ah Runs 8.5 min. on Max w/ motorized head 3:15 to charge
Replacement batteries 2.8 Ah replacement from dyson $130 4.5 Ah Jialitt $55 4.2 (44) 1.05 lbs Most reviews said it was better than original Several failed right away. 1 didn't last any longer. 4.5 Ah TenHutt $56 4.1 (44) 1.06 lbs unavailable 4 Ah Powerextra new - no reviews replaced battery with 4.1 (50) $50 1.4 lbs 3.5 Ah Briswaye 4.4 (81) $50 Reading hundreds of Amazon reviews for the many available. I settled on Biswaye - and 10 weeks in, I could not be happier. I've only used it a couple times, but I can now vacuum every part of my house that I need to on HIGH. That was difficult to do with the standard battery. 3 negative Melted OK for 1 month then only runs for 30 sec