Just a few minutes ago, I flew for a bit. The temperature was 20 degree F, winds about 3mph (ground speed), sunny. I was flying low altitude, between 60-100 feet when battery warning came on at 30%. Started my descent ( bird was very close to GTH position) and I watched the battery percentage go from 30% to 1% within 3 minutes. When I landed, with motor off, it remained at 1%. Felt damn lucky I landed! It seems like an awfully rapid decrease in battery reserve to go from 30% to 1% in 3 minutes. I am wondering if the cold had anything to do with it. I have also only been through one charging cycle. For all of you highly experienced ones out there, please don't jump on me if it's an obvious issue. I'm in learning mode and sharing, hoping to learn and share experience. I'm recharging and then hope to review the data. Any thoughts would be appreciated. Thanks.