Can I charge with more or less output voltage?

Question

Electronics

Good day! There is an e-book, there is no native charging, it writes 5V DC at the input. I have old chargers from NOKIA, one 3.7V and the other 5.7V. Can one of them charge a book?) Thanks in advance for your answers!

Answer 1

The one that 3.7 - definitely will not work. The one that 5.7 will work, but there is a possibility of a device failure.
The easiest way is to use any USB charger, there will definitely be 5V DC. (cable solder / twist)