Are you closing the reader down for periods ? Overnight or even a few days ?
It's better to keep it on standby - and being ignorant about best practice, I posted questions about about this -
( Thread titled : "Help with charge questions..." - or go "carpetmojo" and seek the thread. )
and learnt a lot about managing these pesky batteries from Delphin & Rittlinger
- use the search facility with this title & it'll answer all your questions, I'm sure. It's v
ery helpful indeed.
Certainly clarified things for me, and my 650's holding charge much longer.