In the first instance thanks to all for the answers.
@Gost Nice reader but the lcd screen does not interest me.
There are some personal reasons why I prefer a replaceable battery style Hanlin v3 as HarryT sayd:
-Kiss (keep it simple stupid), for principle. I do not understand why adopt a proprietary solution when good generic does not bring disadvantages.
-To replace the battery with a spare as needed, this may seem strange, but I happen to be in places without electricity.
Moreover, the new reader with wifi/touchscreen has a duration estimated in hours not in pages with consequences on the number of charge cycles.
-Economy, with 10 euro I buy one more battery and exteral charger (for bebook one). For this reason I find a reader who not only changeable battery but a generic battery (availability + savings).