Thread: Youyota Tablet Contact
View Single Post
Zeta is offline Zeta
2017-07-14 , 14:04
Posts: 339 | Thanked: 1,623 times | Joined on Oct 2013 @ France
#764
Originally Posted by coderus View Post
charging perfectly for me. make sure to get good branded charger with 2A output. You just can't charge 4500 mAh battery quickly with poor power source. 4500 / 2000 = 2.25 hours to charge 0-100% with 2A charger. If you use poor charger time can be multiplied by 2-3.
Just a bit nitpicking here (won't change the end result by much) : a Lithium battery is usually 3.7V, whereas the USB is 5V.
So a "4.5Ah" lithium battery is really a 16.65Wh battery. Charged with a 2A USB source, so at 10W, this gives a 1.6 hour to charge (neglecting efficiency).

I still don't get why batteries are described by electrical charge (Ah) and not energy (Wh)...
 

The Following 6 Users Say Thank You to Zeta For This Useful Post: