lf you own the T300, you might order a spare battery. After looking for hours I could find none with the same dimensions and specs.
If the battery has a problem in the future, it might take a long time to find another.
I would suggest the Amazon seller to have some on hand.
I did over a hundred web searches dozens of emails and a phone call.
Finally the company wrote an email that they would send me one from China.
If I find a source I will share it.
li-ion battery 3.7 v, charge up voltage 4.2, 1500mAh
Here is one link that takes months to arrive
The T300 can only use a 16gb memory card. I found one on Amazon HERE .