HXJNLDC DC 3.7V 620mAh 503040 Rechargeable Lithium Polymer Battery for Cozmo ...

Battery works great! I used it to transform some wired headphones into wireless using a Bluetooth receiver. I cut the connector pin on the end off and soldered the 2 wires onto the board and now I have a better sound experience than you can buy in wireless headphones with a battery that now lasts over a week of 24/7 use between charges! It's been like 2 years so far with zero issue.This battery does have overcharge protection. And if you need to replace the wires, it has convenient solder points.

Work as expected

Perfect fit and easy install into Vector 2.0. Correct connector, but needed to switch polarity (very simple).

Fits perfectly in my cozmo!

Good product fixed my doorbell camera install fit price was good. Excellent product.

Worked great for my Skybell video camera! Easy to install. I hope this doesn’t swell like the original battery. Worth the value and it fit great. Battery has not given any problems so far.

Using rhis battery in a camera monitor, it held a charge all day long for about 3 weeks. Then, on the fourth week it started draining really fast. Now it shows full charge when it's plugged in and within 2 hours of unplugging it goes dead. Just checked amamzon and the return window ended yesterday...

Worked great to replace my failing Anki Cozmo battery from 5 years ago. The double capacity is a great plus, although you'll probably get bored before it dies anyways. It does take slightly longer to charge though with the larger capacity, about 2 times longer.Would recommend for anyone who wants to replace their failing Anki Cozmo battery!