“I first charged 15 H to 100%. Disconnected AC, loaded a 12W modem/router, it lasted 8 hours . I charged the unit for 20 H again, disconnected from AC, with 0 load, the battery level starts to go down, it lasted 12 H. Is this normal? Bad battery or else?”
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A ups is designed to prevent disruptions in power they really are not designed to be a power bank. The sealed lead acid batteries used in a ups do not take well to deep discharges every time they do they loose capacity and it could take up to 72 hours to finish a top absorption charge. I would recomend using a good quality lithium power bank if you consistently require off grid power. Remember always pay for the quality you get.
Sorry, there was a problem. Please try again later.Hello Helen, Seems like the unit is working as it should. Decreasing load on the UPS can bring up run times quite a bit as it does not increase linearly. If you have any other questions, please reach out to our support team at 877-297-6937 and we'd be happy to assist. Thank you for submitting your question!
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