So it looks like iOS 10 has changed the charging thresholds and I cannot charge from ports that used to work previously, at least with my 3rd party cables. These still work if plugged into Apple AC adapter. A pain, because while said USB ports don't charge as quickly, they are more readily available than an AC plug, and one of them is to let me tether to my Kangaroo PC so I can use my iPad as its touchscreen. Official Apple cable makes no difference, it just seems to need more amps now. Sheesh. Hope there will be a tweak forthcoming.
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