Sent from my SAMSUNG-SGH-I717 using xda premium
There may be two variables at play here - the cable, the charging source. I know with my Advantage the stock charger (with no removable cable) had an additional pin which told the Advantage to charge at a full 1 amp rate vs. the standard 500 ma available from a USB port. I think the stock Note charger is rated for 800 ma, don't have it here to verify.
Using the Note's stock cable I've seen a fairly fast recharge time both from the stock charger and my computer's USB port. Yesterday I drained down to 6%, plugged into my work computer (stock cable) for 2 hours then 1 more hour in my car and I was up to 77% after. Which included some time streaming XM via blutooth. Then plugged into the stock charger at home and was up to 100% after a few hours even though I was tethering via Wifi to 2 computers with heavy surfing.
We would need several tests to see if there is something special about the stock charger, the stock cable, or both. But compared to my Advantage it charges way faster and uses much less energy - excluding the display.