14.4V 6000mAh Replacement Battery Compatible with Narwal T10 J1 J2 YJCC010 YJCC003 YJCC001 Robot Vacuum Cleaner

No problems. Started right up!

This battery works fine. It doesn't last quite as long as I would have hoped, but it's an alright option. Just make sure it is compatible with your device.

PRODUCT DESCRIPTION - 14.4V 6000mAh Replacement Battery Compatible with Narwal T10 J1 J2 YJCC010 YJCC003 YJCC001 Robot Vacuum CleanerUNBIASED - Amazon Vine reviewers are not paid for reviews, be it positive or negative. I will never recommend a product I would not buy myself. I treat ALL vendors with respect and fairness but my duty is to You, the Amazon customer. I am an Amazon customer too. I have every reason to be sincere in my reviews. If it is junk or treasure my reviews will reflect the products, I give my word of honor.PERFORMANCE – It seems like everything has a Lithium battery in it these days, as battery technology continues grow the sophistication of Li batteries is amazing. These batteries actually have the chips to protect themselves from damage using BMS or Battery Management System. The specs tell the tale. The batteries came in properly charged according to the specification. Don’t be alarmed if your battery arrives at 90% capacity, because that level of charge is sometimes used for battery health, again in some cases. I ran 20 discharge/charges cycles with NO change in capacitance! The amperage was great as a matter of fact. I could detect any drop in charge capacity. Very impressive. You can't get that type of performance if a battery is of poor design and construction. I will definitely keep this company in mind for replacement Lithium batteries and I recommend you give them a try too. The numbers are facts not opinions. I was lucky enough to have a friend who is a very talented electrical engineer for testing.