Liter 3.7V 600mAh 503040 Lipo Battery Rechargeable Lithium Polymer ion Battery Pack with JST PH 2.0mm Connector

As you see in the first photo it is a litter 1 ml of the original one but it still fits in the robot. Fit perfectly my Cozmo robot, if you looking for a good quality battery I recommend this seller even if he gave you a card whit personal customer services and support I love that and I love the quality of the product.

This new battery's tech spec meets the original one but have to cut off the plug then solder the wires due to the DVR does not have a plug. Works great so far, the best: this battery has a small metal pan to hold the battery and can cool down the battery's heating issue in summer though I don't know how long the battery can last . Thanks a lot.

Battery fits and works for the Cozmo toy. Only a little of squishing it in was required, but it still fits inside the toy with no problem. Cutting off the plastic connector and soldering is required. Battery seemed to have a full charge when I received it, which was really helpful during the repair.

This replaced a battery that wouldn't hold a charge and come to find out was expanding so desperately needed to be replaced. Despite the matching part numbers, this one was a bit larger, however it was pretty close to the specs as stated in the description. So far the battery seems to be holding out quite well. Charge less for a good amount of time and the build quality seems to be pretty good.

I actually bought this hoping it would work for something other than what it was intended. I took the pcb off of this one and replaced it with the pcb from the failed battery out of my Raven Dash Cam and it worked perfectly. Saved me having to spend another $300 on a new dash cam.

Just a note of caution. After reviewing lot off online sites, I purchased the Liter 3.7V 600mAh 503040 Lipo Battery. This was intended to be used on the Cozmo Robot. Unfortunately it did NOT work out. The dimensions was 42 mm instead of 40 mm in length. I ended up buying KBT 3.7V 500mAh Li-Polymer Battery: 503035 which worked perfectly (35 mm in Length) . I am going to conclude that the manufactures redid the design and hence the newer version of the battery is now incompatible. Hope that helps. Shipping was on time

Perfect for my Cozmo robot! Happy to have him back to life.

Battery doa. Wish i would have tested before i installed it. Little big for the cosmo but it fit.

Mi batería llegó un día antes de la fecha programada. Lo instalé un mi cámara de retrovisor de automóvil, está funcionando bien, esperemos a ver el desempeño.