These totally revived my 20 year old Remington electric razor. I had nurtured it along for along time by keeping it plugged in while using but finally the batteries were so bad, it wouldn't even do that anymore. These razors are not designed to have the batteries replaced so I had to perform medium level surgery to change them but as opposed to spending $150 plus for a similar type of shaver today, it was worth the effort. It charges and holds the charge for a long time and I don't have to leave it plugged in to use it anymore. Would definitely buy again. The batteries I received did have the polarity marks (, -) on the ends.
Rating: [5 of 5 Stars!]