I do not know when, but they changed the battery capacity to a more real value:
"Fortunately, your iLiad will allow you to read and write for up to 12 hours* without recharging the battery"
together with
"*With current Software Version 2.9 and depending on usage pattern"
While it is more honest, it also implies that the low number of hours is due to software version. They have already admitted that they hit the ceiling on that already, but maybe Rincewind's achievements have encouraged them?
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