I wondered too, and the button seems to flash red close to the end, but there is still some 1.5 h of ~50+ lm reserve left. This, plus the 5-clicks voltage check on demand should do it.
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I wondered too, and the button seems to flash red close to the end, but there is still some 1.5 h of ~50+ lm reserve left. This, plus the 5-clicks voltage check on demand should do it.