DC 3.7V 620mAh 503040 Rechargeable Lithium Polymer Battery for Cozmo Vector Robot SkyBell HD WiFi Video Doorbell Flysight FPV Watch Wireless Speaker Battery Replacement

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!

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.

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

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!

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...

Bought a house with an expensive Skybell HD V4 Video Doorbell. The thing was working in short bursts, couldn't figure it out. Checked the connections, all was good. Found that the battery on these would expand and die, and that's what happened to mine.I pulled mine apart and found I needed a new battery. I found this replacement on Amazon. Don't do what I did....I threw out the old one before the new one arrived. The plug is not an exact match. You need to splice the wires from the old battery to the new one. The plug is slightly different.Since I didn't have the new one, I improvised. I followed my college engineering training.Step 1: Is it working now? NoStep 2: Does the part jam? Yes, the plug doesn't fit cleanly.Step 3: If this battery doesn't work, whats the alternative? Spend $250 for a new doorbellStep 4: Follow the old adage of:If it jams, force it, if it breaks, it needed fixing anyway.I jammed the plug into the socket on the camera using a pair of needle-nose pliers and got it working. The doorbell has been working the last month without issues. I would call this battery a replacement, even if it was a bit more difficult due to me shooting myself in the foot throwing the old one away before I took the plug.