The Vankyo Performance V630 is a powerful HD projector that balances high-end features and specifications with affordable characteristics. It has a Full HD native resolution of 1080p, a powerful 5000:1 contrast ratio, and automatic keystoning technology. These high-end features and its relatively large size make it a worthy addition to any home theater, academic, or office setup. Because of its more classical projector design and ergonomic profile, the Vankyo Performance V630 is a great choice for HDMI screen mirroring functions.
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This excellent article describes that dangerous overcharging is likely if we charge a 3.7V lithium ion cell at 4.2V and forget - in the constant voltage phase - to switch off charging after the current has dropped to one tenth of the initial value. But will this overcharging be a risk at *all* charging voltages all the way down to the minimum voltage that can move ions within the battery (around 3.4V, I guess). Put differently, is there a voltage between the minimum (3.4V?) and 4.2V at which it is safe to simply let the constant voltage phase run forever?If such a lower safe voltage does not exist, how long would it take before charging at, say, 3.9V would start to cause trouble? Hours, days, weeks?I'm asking because I have a setup that can store energy from solar panels in a lithium ion battery and where it would be ideal to just cap the charging voltage of each cell at 3.9V in place of introducing a real charger. 2ff7e9595c
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