I bought these to moor boats. Charged and tested ok. Switched off. We were only used after 2 weeks and the batteries were completely empty. I thought maybe I did something wrong, so read the instructions again. I completely reloaded. You passed the test normally again; Turned them off according to the instructions and a week later the batteries sat back down. What a bunch of rubbish! I bought it in the off-season and I can't return it. Very disappointed; they weren't cheap. The only way around this is to leave them on the charger continuously. It's also not good for battery life.
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