ever see one leak??
Eneloop - never, from an other manufacturer once. However, if fully discharged, voltage may go slightly negative, if still in device, which will certainly affect on cell life. That happens few times .
I'm actually not aware anyone provide official leakage tests for Eneloope, However, you may test one or two.
I still use original 4 hours charger Sanyo NC-MQN09W (4x AA/AAA), -delatV protection. More than satisfied.