AWWW s*&t all I wanted was some info on the new battery from those that had the replacement battery and to inform how mine was or was not performing. I'm not a Frappin battery expert, I don't even play one on TV, I'm like most people I charge the thing and use it till it needs charged again expecting the manufacturer would be able up front about their runtimes in the real world. I would think MagicShine would inform anyone getting the replacement battery if there were going to be issues with the original headlamp unit and the supposed runtimes.