Hi Terri,
I bought 2 of the cartridges from APH and really like them. I am not sure
how many books can be stored on one but I assume it depends on the size of
books. I put 18 on the first one and 14 on the second. That is 164 and 167
hours.. I am on the 6th book on the first cartridge. It will be a while
before I need to get some more. I hope this helps.
Walt
WA4QXT
Groton CT
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