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What's the deal with Philips/Norelco razor batteries?

Discussion in 'Electronic Repair' started by Guest, Mar 31, 2007.

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  1. Guest

    Guest Guest

    My new Phillips razor (8150XL) has a lithium-ion battery. It fully
    recharges in 1 hour, but the manual says to charge it 4 hours the
    first time it's used.

    Could someone please explain why the initial charge takes (at least
    supposedly) 4 hours? Especially for a Li-ion battery, this doesn't
    make any sense to me.

  2. JR North

    JR North Guest

    Depending on initial charge state and storage time before sale, the
    battery may be low or dead when you buy the razor. The initial 4 hour
    charge baselines the battery's full charge state. The razor electronics
    probably shut off the motor at a specific loaded voltage, from which the
    battery is calculated to recharge in 1 hour.
  3. Jim Yanik

    Jim Yanik Guest

    battery conditioning.
    Also,many Li-ion batteries now use a processor IC to monitor charge state
    and control the recharging,and it needs to develop baseline data.
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