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Would like to see if any of these are compatible with solar USB chargers (ie. the charger should automatically resume charging when there’s a drop in USB voltage). Most USB-powered battery chargers will discontinue charging when USB voltage drops below a certain threshold (and such conditions happen frequently with solar USB charger)
The VP4 Plus Dragon doesn’t have invidual charging current control right? That is, selected charge current applies to all slots. Would probably be good if invidual slots can have individually selected charge or discharge current.