Battery Replacement in Electric Razor

I have a cordless electric razor. It's a Sears brand. It says 6VAC

7VA on the rear. I opened it and found a simple circuit board, and I already know that's a rectifier circuit. It gets charged from a black box wall transformer. Anyhow, in the razor itself, there is a large rechargable battery. It's round and long, about the same size as a C Battery. The razor belonged to a relative who passed away. It sat in a closet for at least 15 years. It's nearly new, and works fine, but the battery is weak. This battery is just the type with solder on metal straps on the ends, so it would be easy to change. Knowing Sears, they wont have parts anymore for it. The battery is not labelled. From what I know, any single cell battery is about 1.5 volts. OR is it possible to place several cells inside a round battery. In other words, how do I shop for a replacement?

Thanks

Unless one or more is shorted.

It's almost certainly a NiCd. It should be possible to determine the number of cells by inspection - remove any outer cardboard covering if needed.

You can get replacements from electronics distrubutorts.

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