Originally Posted By: JBjorgen
I find the Anker ones acceptable considering the significant cost savings.

Agreed. I've ordered a few of them for my clients and they seem good on follow ups. Generic replacement batteries are so notoriously bad, it's nice to have a reliable manufacturer. I love that they seem to be sticking with this rather esoteric product segment, particularly when it requires keeping such a wide array of models in production.
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Matt