I would not buy a 180W charger for the Inspire 1 batteries. I don't know who is Lynh Phan, but battery charging in 0.5C - 1C max, prolongs battery life, is not a secret. For a TB48 (5800 mAh), 1C equals 5,8 Amps.
"The advised charge rate of an Energy Cell is between 0.5C and 1C; the complete...