The re-chargeable batteries came with a pretty good initial charge and I haven't had to purposefully leave it to charge yet. Works well in my optical mouse, which I can't say has historically been the case for all rechargeable batteries.Some folks had commented on them being a little bit thicker and not fitting devices. I can tell they are a smidge thicker, but that did not stop them fitting in the devices I've tried to use them in thus far. (Logitech Performance MX mouse is the primary one).So far the charge seems to last longer than the battery I was using before too, and I don't think that's just from me forgetting to plug the old one in once and the other end of the plug getting pulled out (oops!) since that was a longer term observation.Satisfied with the purchase so far. Will update if it seems like there's anything below expectation when/if that ever happens.
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