rockbox/www/docs/battery.t

Q1: Are my batteries charged all the time when connected to my Player/Recorder?
A1: Player: the charging is all done by hardware and the exact
    functionality is hard to determine. It is however not recommended to keep
    the charger connected for more than 10-15 hours if you're not using the
    unit.

    Recorder: no. The charging algorithm is carefully crafted in to not wear
    out the batteries any more than necessary. If you're using your unit
    connected to the charger most of the time, use the 'deep discharge' option
    to save your batteries somewhat.

Q2: Will keeping my charger connected a long time damage my batteries? Can I
    leave it over night?

Q3: Does Rockbox charge the batteries more/less/worse/better than the Archos
    firmware?

Q4: What kind of batteries are there in my factory default Player/Recorder?

Q5: Is it hard to change the batteries? Does it void my warranty?

Q6: How much cost replacement batteries? Where can I buy them?

Q7: What kind of run-time can I expect on a set of fully-charged batteries
    when running Rockbox?

Q8: Can I use different batteries in my Archos?

Q9: Can I use non-charable batteries in my Archos?

Q10: Can I use a different charger?

Q11: Can I buy a replacement charger exactly as the one Archos shipped?