The proper matched batteries must be used. They must be matched to the charging circuits. The batteries are using solder tabs to the circuit board. They are not user changeable. The batteries are solderd on to the circuit board.
Some industrial electronics suppliers can sell the batteries, or it would be best to order them from Philips. It would be best and safest for you to send the shavers to Philips service to have them change the batteries. The battery type depends on the model and series in the particular model. If the shaver is less than about 4 years old, many of the newer series batteries should be chargeable Lithium Oxide based.
I don't know your exact model, but most of their shavers use a security Torx tool to open them. The Torx screws are usualy hidden under rubber moldings, labels, or buttons that are glued on.
The security Torx tool looks like a 6 sided star with a security pin in the center. It is not compatible to the Allen standard key.
Jerry G.
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I have had this unit for over a couple of years... last couple of years it has been in drawer, not used, because it wouldn't start. Tonight, too much time on hands, thought I would try and take batteries out for changing. After unscrewing the philips head screws on head end, I took off the screws for the base. Bloody bugger started right up after I tugged on the smaller pin. Pushed it back in, it quit running, pulled it out after reassembling with forceps, and it runs. It is on battery charger now. Is that pin suppose to act like this?
battery
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