Thanks, the MTB guys really get into lights. But I'm not going to join another forum to do a search. And I probably won't be opening a battery pack strictly out of curiosity.
But the reason for my post want to verify whether and one ever reviewed the brand and capacity of the cells used in batteries from DealX or geoman and whether there have been any cell vendor changes in production.
In theory, the battery used be MAgic Shine could be using cheap $6 cells or pretty great $10 cells - resulting in anywhere from a 25-40 Watt hour battery. My battery must be at least 30 Watt hours, which is an "OK deal."