For those who are interested, the PowerBank Smart Charger from GP Batteries will be available in Singapore in about 2 weeks time. I've just spoken to their marketting and they said the stock is already here, and now they are undergoing testing and approval by SISIR/PUB. This fast charger can fully charge up 4 1800mAh AA batteries in 65mins and 4 1600mAh AA batteries in 60mins. See here for more details.