I have not seen a connector issue so far.
I have the green/red indicator version of the 900 lumen light from 2009, not the latest one with other colors of battery level.
I noticed when it was red, I could unplug it and it would be green for a long time.
I've concluded that my replacement Geoman battery is much worse than the original one recalled.
It does only 30-40 min on high after a full charge before the light and indicator were both off.
Must be a bad battery.
got out the old DVM: the orig charger is 8.48VDC open circuit, the newer one is 8.51VDC open circuit... similar.
Last evening, having run on low mode for >2 hours after the indicator first started going red, I unplugged the battery, it measured 7.35VDC open circuit. The next morning, after being plugged in all night powering the indicator only, the battery measure 1.4VDC open circuit.... It seems my battery does have 1/3 of the rated capacity.
I think I will buy a new battery from somewhere, ... don't know where, are there good options?