That is why I have electric shavers and buy dispoable razors. Electric costs little to run, and the disposable gives me the same shave as the pack of expensive blades. Not surprising seeing as the blades are the same made on the same line, and the plastic mount is the same as the premium one just welded to the handle. The pack of 5 costs the same as a single unit of the "premium" one, and lasts just as long as well.
Funny thing is the Phillips razor I have has a power supply that will charge the internal cells from an input voltage that starts at 12VDC and stops at 250VAC. Not mentioned in the manual, but I looked up the chip as it died. My solution was to simply bypass the whole lot ( chip is unobtanium and the board is more than I would pay for the complete unit) and place a current limiting resistor and use a 12V wall wart as a charger. I also replaced the 2 very old NiCd cells with higher capacity RS cells I had spare, now it runs a lot longer between charges, though now I just have to charge it for 12 hours from empty, and the charge state indicator just blinks as it communicates with the charger for battery status.