About Cellularmega: 
(1)Cellularmega is specialized in manufacturing power tool batteries. 
(2)Cellularmega products are made with the highest quality materials.Our products are CE certified, tested by manufacturer to match and/or exceed specifications of OEM products. 
(3)Cellularmega focus on providing high quality power products and excellent customer service,Looking forward to your support and your positive affirmation.

Advantage:
This Battery is Designed for iRobot Roomba 500 510 530 532 535 536 540 550 551 562 570 572 580 590 610 760 770 780 Vacuum Cleaners,It is a kind of Ni-MH Rechargeable battery,you can carry it 

anywhere anytime, convenient to use.And it's has no memory effect. Can be charged or discharged as needed without loss of capacity.The functions are the same as the original products 
Uses the highest quality cells, safe with rapid-charge technology while providing overcharge and over discharge protection to increase the life of the battery 

Product Details : 
Battery Capacity: 3.5AH 
Battery Voltage: 14.4 V 
Battery Type: Ni-MH 
Color:Yellow 
Dimension: 5.7 x 2.7 x 2.5 inches 
Weight: 1.6 pounds 
Condition: Brand New High Quality 

Compatible with the following models : 
iRobot Roomba 80501, 500, 510, 530, 532, 535, i540, 550, 560, 562, 570, 580, 610 Professional Series, R3 

Compatible P/N. : 
80501, 53847243 

Battery Maintenance:
1.Always remove battery pack from your tool when you are assembling parts,making adjustments,cleaning,or when not being used for an extended time.
2.If you don't plan on using the Power Tool Battery for a month or more, store it in a clean, dry, cool place away from heat and metal objects. Ni-Cd, Ni-MH and Li-ion batteries will self-discharge 

during storage; remember to recharge the batteries before use.
3.Do not leave the battery dormant for long periods of time. We recommend using the battery at least once every two to three weeks.

Warranty:
Cellularmega is committed to providing each customer with satisfactory products and customer service.
All the Cellularmega products are covered by 30 days money back guarantee and 12 month warranty from Cellularmega.hk