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Use this guide to replace the battery of your Philips Norelco 2100 as it may be defective.
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Remove the single screw on the back casing using a T8 Torx screwdriver.
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Turn the shaver so that it is facing you.
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Press the button on the shaver head to open it.
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Remove the two 10.1 mm screws inside the shaver head using a T8 Torx screwdriver.
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Lift the shaver head off of the casing.
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Gently pull the black and blue casing apart using a metal spudger.
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Pry the remaining casing open using a metal spudger.
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Remove the clear case that holds the circuit board by lifting the latches on the sides and then pulling gently.
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Located directly behind the circuit board, remove the battery from the device.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.
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USFT-THOMPSON-F17S1G4
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To remove the battery you have to actually desolder both ends from the chip.
What are the dimensions/specs of the battery?
regular AA rechargeable batteries will not work and can be a fire hazard.
The tricky part is taking the case appart. You have to gently pry on tabs to get it appart. You may break some pieces which probably won’t be a problem. May make it no longer waterproof. The battery is custom but is close to a 14450 Lion battery, do searches on ebay and aliexpress you will find them. Good luck.
I have a similar Norelco razor and replaced the battery. I can’t believe the stupid company didn’t mark the battery polarity on the board!
I think this is the first time I have ever seen a company not mark polarity.
