I recently ordered two Gemini batteries to use with my Magicshine light head and MS charger. One of the two batteries has lasted 3+ hours twice in temps in the 30s and 40s. The other battery lasts only 1.5 hours or less the two times I've tested it. I'm bummed. Of course of my two original MS batteries, a year later one lasts maybe 2 hours and the other lasts maybe 30 minutes. These times are all on the high-lumen setting.

I'm sure I'd pay more in shipping back and forth to Canada than what the battery's worth. I'll probably just move on... Warranties on low-cost items really aren't worth the hassle. Maybe Geoman will really come through on my two MS batteries, though I've never heard from him.

Sigh... At least my (mechanical) bike works. And it only has 33K miles on it.