After some research we could hardly find more batteries APN: 616-0366, they are replaced at most dealers by APN numbers: 616-0347 and more rarely by reference APN: 616-0428
Beware of sellers who advertise to sell a battery for iPhone 3G, Li-ion Polymer Reference APN: 616-0431 / 616-0433 / 616-0435 / 616-0346, Li-Polymer Battery for Apple iPhone 3G (replaces 616- 0431) + Genuine [cellePhone] ScreenCleaner because they are not 3GS 1400mAh battery and 1150mAh 3G.
Or sell the same battery for iPhone 3G / 3GS Battery for Apple iPhone 3G, Li-Po battery, iPhone 3GS M & L Mobiles | BATTERY FOR APPLE iPhone 3G | 3GS Li-Polymer Li-Polymer Battery for Apple iPhone 3GS (replace 616-0431 ) + Genuine [cellePhone] ScreenCleaner. According to Apple Part Number reference it there's a difference in the management of current between a 3G and 3GS battery.
On the product picture is well marked APN: 616-0366, but the location of the golden standard liserai does not seem to me, and too smooth the sticker on the front of the battery.
The official iPhone 3G batteries, are given to 1320mAh max, so this value of 1600mAh perplexing and very suspicious about the official origin of this product: /?
Another point, the product is shipped to Germany, this is a few days of waiting longer to receive it.
![TeckNet® iEP380 PowerBank 7800mAh External Backup Battery with dual USB output and charger with built-in flashlight for Smart Phones, Android Phones, PSP Vita, GoPro; iPad 5/4, iPad 2/1 mini, iPhone 6, 5 (iphone 5 cable is not included); iPhone 4S, iPad 3/2/1; Samsung Galaxy S4, S3, S2, Galaxy Note 2; Google Nexus 7, Nexus 10; HTC One, Sensation, One XVS, EVO 4G, Thunderbolt; Nokia Lumia 920 900 N9; Motorola Razr; Blackberry Z10; Sony Xperia Z - [Warranty 18 months] (Electronics)](https://img.tgreer.com/thumb/85x85/a/f3/af3ba7d68e0ce476.jpg)
