I got 8 rechargable batteries for using in my baby's swing. That way I could use 4 and charge the other 4 and keep switching out. I only use the swing an hour or two at most per day, but find I have to switch the batteries out almost daily!!!! Regular batteries have lasted for weeks. I'm extremely disappointed in the life of these.
This review was written in the old system and had content requirements that are different than reviews written today.