I have a Sony Digital8 that takes three-contact InfoLithium NP-FM series batteries such as NP-FM70. Is there a charger compatible with these that will attempt rejuvenation cycles?

While I'm at it, I saw one YouTube video where they use a pair of 18650 rechargables to replace the original cells with the caveat that doing this can create a fire hazard though after doing this it did fire up the camera. Anyone have insight regarding this?

Thanks.