Looooooove my rechargeables! I mean, there's going to be variation between toys and brands, of course, so I'm sure there are rechargeables that suck. And there's always going to be variations in power, due to the type of motors used (same as battery powered) and due to the type of rechargeable battery they use. But in general, a larger percentage of rechargeables seem to be higher quality, in my opinion, probably due to the price tag. But I love not having to buy batteries and the charges seem to last a long time, at least on the toys I have. I have to WORK to kill the battery my Lelo Liv! My Mia only gets a session or 2 out of a charge depending on the setting and how long I play, but I love it any way, and I love the convenience of a USB charge. I can even charge it in my car since my car stereo has a USB port! LOL! The only thing I wish is that more companies would use batteries that cannot be overcharged because I worry about that a lot.