1900mAh Slim Back up battery for iphone 4/4s- IP19F
 
1900mAh Slim Back up battery for iphone 4/4s- IP19F,it's not only a stylish protective case but also an excellent back up battery pack.  More slim,more elegant,power your iphone at home,office or travel freely.
 

Specification:                            

• USB charging and data transmission                              
• Capacity: 1900mAh(Li-polymer battery cell)                                         
• Output: 5V/1A                                                        
• Colors: black 
• Material: ABS
• Size:128x62x16.3mm
• Weight:70g                                                                                               
• Packing: Blister Box                                   
• OEM brand                                               
• Apple MFI available, 3USD.     

Almost Double the Power of iPhone 4/4S
This  battery case for iPhone 4 and 4S virtually doubles the power available to play, talk, surf and blog.
A full charged case gives you:

-Up to an additional 6 hours on 3G, up to 10 hours on 2G, of Talk Time
-Up to an additional 30 hours of Audio Playback
-Up to an additional 8 hours Video Playback

Advanced Battery Technology
Hi-tech, A-grade Li-polymer battery that can recycling for more than 500times. Built in overcharge, short circuit and temperature protection. No memory effect. Charge your device smartly.

Battery Status Indicator
To check the power level of the battery case, just push the button and the LEDs will indicate the status clearly.

Power On/Off
Long push the button to turn the charging on or off. So you can control the battery case to charge the iPhone or not.

Reliable Quality
We only use A-grade battery cells. We use Seiko chipset to manage the power. All product come from our ISO9001 certified factory. Every piece of product are through functioning test and burn-in test to ensure quality. We prepare spare parts for distributors to ensure customer satisfaction.

MFi
We are Apple authorized MFi licensee and contract manufacturer. We can help you to bring to branded product to market fast with MFi certification in a very cost effective way.