Note : 14.4V and 14.8V are compatible, they are in common use.
The 14.4V 4500mAh(12 cells) Irobot ROOMBA 521 battery is made of high-quality lithium-ion battery cells, which has been tested to be brand new and totally compatible with the original manufacturer specifications, meets or even exceeds the original battery performance. With high-quality battery cells and materials, your cordless vacuum cleaner will run longer and more secure. Moreover, this battery has no "memory effect" and you don’t need to discharge before each charge. It is more convenient for you to use our replacement Irobot ROOMBA 521 batteries.Our Irobot ROOMBA 521 cordless vacuum cleaner battery which we design is in strict accordance with the highest control standards. It carries with a smart interior circuit board that provides battery-unbalanced-shut-off protection, thermal runaway protection, overcharged protection, over-discharged-shut-off protection, and high/low-temperature-shut-off protection. Irobot ROOMBA 521 vacuum cleaner battery is made of environmentally friendly materials, without lead and mercury. It is certified as a safe and reliable product through a series of rigorous tests on the Irobot examine system.
Thank you for shopping the Irobot ROOMBA 521 replacement battery at LaptopBatteryDirect.net. Our batteries are packed in cartons with anti-static bags and anti-pressure sponges to effectively protect the batteries in transit. We have a rigorous inspection process to ensure that your order (e.g. Irobot ROOMBA 521 battery) is perfectly functional before shipping to you. Before placing an order, you'd better look at our battery from following pictures and check if it is the same as your original one. Please make sure that you pick out the correct battery to avoid ordering mistakenly.
Compatible Irobot Part Numbers
Compatible Irobot Vacuum Cleaner Models
ROOMBA 563 PET
ROOMBA 565 PET
ROOMBA 765 PET
ROOMBA 776 PET
We offer Full 1 Year Warranty on our Irobot ROOMBA 521 battery. Warranty is applicable if the buyer has installed the battery properly on the device and has treated the battery correctly.
30-Day Money Back Guarantee
30 Day Money Back Guarantee if you are not satisfied with our Irobot ROOMBA 521 battery. We will check all functions of our all products before delivery. Please note: in order to qualify to get your money back, you must first contact us and await instructions before sending back your product.
If there is any problem with the battery you purchased from us, please contact us first. We will proceed your request and seek solutions to your problem. If our technical engineers cannot solve the problem, we will generate the RMA number for you (Return Merchandise Authorization) so that you can return the battery to us. If test result indicates that the returned battery is defective, we will bear the shipping cost of the battery.
Please note: we cannot process returned batteries if you have not yet received an RMA number.