They look just like the ones that come with the old Genie openers. Except they use smaller CR2025 batteries, which is a good thing because they're widely available and cheap (compared to the small 12V cylindrical types). Maybe this means shorter expected battery life, but I don't know yet. Another oddity is that they look like they have the same battery compartment as the original, but it's just a cutout in the plastic case. It amazed me. In fact, you have to disassemble the two halves. I didn't end up needing it because if I remember correctly the batteries were built in. Overall the remotes work within the expected range and two for this price is pretty good value.
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