The Sparkole 14.4v 5200 mah battery for my roomba 900 series has breathed new life into it. It vacuums 30 minutes longer and appears to have more power. I will have to update the review when I get a better idea of it’s longevity. The original battery lasted two years before there was a noticeable diminution in it’s vacuuming longevity. I have had the new battery approximately three weeks without issue.
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