I’m surprised that the series 3 shaver still has a Nimh rechargeable battery rather than a LIon battery. Refresh my memory, does a Nimh battery have a memory similar to a Nickle Cadmium battery? Give us a review of your new shaver.
I've got to take care of a few things this afternoon so my shave won't happen until later with the review coming tonight or tomorrow morning. I will say right off the bat that I have some trouble spots that all Electrics flare up occasionally so take my review with a grain of salt. As I've said many times before, electrics are absolutely the best thing I've found in terms of getting a close shave with little to no irritation but it does still occasionally occur and I've still not found the 'perfect' system (aside from lasers preventing the hair from growing at all, I dont think we will ever find perfect).
There is some opinion than can change this next statement but in general Nimh falls between LIon and NiCad. It has more charge per weight and better memory then NiCad but not as much on either side as LIon. It does suffer from some power loss at lower charge levels and if you are used to LIon (and run your shaver battery down frequently) you may hear and feel a difference, its MUCH better then NiCad though as they slowly get weaker as the battery depletes.
Four huge advantages to Nimh over LIon: less expensive, more resistant to temperature and humidity fluctuations, can handle overcharging better (crap, I left my shaver plugged in for 10 hours at work), and if it fails it just kind pops open like a seam where LIon literally turns into a small bomb.