Our battery Roomba who we let go and not wanting to put 80 on the manufacturer's website for a battery that has not taken 24 months my choice is focused on this battery, announced at 3500mAh (Original battery by 3000). Order / delivery level, no worries, the merchant (hannets) was serious and fast. The battery is installed without any problems in the original housing. Now after 2 cycles of charge / full discharge, autonomy is excellent, no complaints for 30 less than the original battery brand, I recommend this product without hesitation! I would complete this comment based on the time duration / longevity.