Thanks for everything
One of the battery holder sockets broke within seconds of first use due to design flaw, the tiny plastic flap notch that keeps the battery pressed against the contact spring is too weak, the spring is stronger and the pressure broke the plastic.. The other 2 battery holders are not broken yet.. It's too expensive to return for a refund, tracking numbers for proving that it was returned costs more than the product itself from Australia, and it's not true that Aliexpress always rules in your favor and refunds you without having to return it..