Functioning time: 6-8 hours These batteries worked great, but the best 5 mentioned above rose to the top within their respective categories. As time goes on, we hope to test a lot of far more batteries through the leading manufacturers during the industry, which includes Jackery, GoalZero, and Renogy. https://zanderarqiu.kylieblog.com/30044397/the-2-minute-rule-for-solar-power-deck-lights