After receiving two separate packages with more DOA batteries, I let them know that I continued to be unimpressed with their customer service and quality control, and that, while I HAD NOT left negative feed-back, I would if they continued to provide poor customer service.

Their response, obviously by someone else:

"Dear Customer;
We are so sorry to hear that you having problems with your item. Please accept our sincerest apologies for this unfortunate matter. We stand behind all our products and services and we are fully willing to take responsibility for this defective product

Would you be interested in receiving a replacement?
Let us know."

I chose to purchase new batteries from Amazon, which arrived fully charged and functional!

Tech-rabbit's customer service is a joke. While they were happy to send me dead battery after dead battery for two drones I purchased for them, it took them forever to answer emails and, when they did, they were very rude.

After more than a week of no response, I threatened to leave them negative feed-back (i.e., I had not done so yet). This was their response:

"Why would you like to leave us a negative review, when you clearly can see we are trying to help you? Mr. Rude."

When I responded that I was sitting here with two useless drones, they again responded:

"I was more then happy to assist you with this matter since that is part of my job, to make sure all of my customers are satisfied, but the fact that you threat me in every of your message, makes is very hard for me to assist you.
Being nice to others does not cost anything, it is free. You should learn that."