Ortega, I have one which I bought from the apple shop at funan, not branded and mic.
So far so good. However, would suggest to buy from those apple shop, in case any problem still can go back to the shop.
FYI, I got one around $14 for eBay. Charges about ~50% but takes forever (like >1hr). When charging while playing game or streaming video (battery intensive activities), it will stop charging, so best to just leave it or charge when your phone is unused (in your bag etc).
For something this cheap, I really can't complain. But I am tempted at some reputable 3rd batt packs (e.g. Exolife, Mophie Juice Pack) that acts as a case protector but adds a bit of bulk to the slender iPhone. The real bummer would be price, costing northwards of SGD$100.
I would say go for the Sanyo charger as it is multi-purpose and presents the highest bang-for-buck, though my China battery is sufficient for 90% of my daily needs
actualli i feel that the emergency batt charge very slow. but still it recovers realli alot. but wad i realise is the usb thingy from the battery charging the iphone not realli stable. if accidently bend abit may damage the iphone usb port lei.
Bought one from Dealextreme at $5/6 (conversion from exchange rate) with other usb AA charger. Charge free electricity from company's pc and put the AA batteries into the Iphone portable charger. It charges as fast as plugin charger but up to 80% charges. But Who cares, its so cheap and it works very well..
yes, it works quite nicely. only bad thing is my iphone becomes 1.5times as long with the external charger, can only hold it or put in shirt pocket (small problem actually). Dont expect it to recharge your iphone in an instant thou. In My case, from 20% to 95% and above, takes about an hr.
I cant find any brand on my external charger, dont even know if its from china. I always place it in my car, in case i need it, plug it in my iphone when i need to and bring it along, better than car chargers cause u will need to be in the car all the time with the engine on and cheaper too.
Another alternative to share, I bought a usb cable that is similar to our iphone usb cable supposedly for ipod from Daiso, only $2! can use to charge or transfer materials using your laptop too.