Quote:
Originally Posted by theducks
Sorry, but electronic theory does support a long charge.
When charging Capacitors (and more so, Batteries), they are always approaching a full charge as the never truly reach 100%. The charge gain just becomes smaller and smaller and smaller.... 
(charge curve,  ) |
Not quite what I meant. Firstly, because the charging voltage is always larger than the target voltage for the battery, the asymptotic approach to the final voltage is not as much of a problem. In fact, for a current controlled charge from a higher voltage than the battery, it is quite a different situation.
However, the important point is that, reliable operation of the device is achieved with a battery voltage way less than fully charged, obviously. For a device than goes so long (normally) without needing to be charged, even if you only get to 75% charge then start using it, for example, then you should NOT be experiencing any operational problems - yet excessive charging is still suggested when people experience problems - go figure.