I've been using a Philips electric razor that someone didn't want and gave me for the past 15 years. The battery (I think it's still a NiMh, that's how old the

I've been using a Philips electric razor that someone didn't want and gave me for the past 15 years. The battery (I think it's still a NiMh, that's how old the thing is) is getting bad, but it's still OK. Never changed a blade.