Electronics Repair Questions? Ask an Electronics Technician
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The 8109 has nanoblades so it should give you a closer shave with less burn.
The batteries lose their effectiveness and need to be replaced after a few years.
If the battery is dead and will not hold a charge any more, then it will need to be replaced.
If you have installed a new battery and charged it, and the shaver still won't work, then the charging circuitry inside the shaver is suspect and it will require a repair or replacement.
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