Instruction: First, identify the target attributes from the provided list. Then, scan the product title, description, feature, and brand to extract the values associated with each target attribute. Finally, create a list of dictionaries, each containing the extracted attribute, its corresponding value, and the source where it was found.

Input:
Product title: EPCTEKWhite 2600mAh Portable External Battery Power Bank Backup Charger for iPhone 5, 4S, 4, Galaxy Nexus, Blackberry, HTC, LG, Motorola,Nokia iPod Touch / Samsung Galaxy S3 S S2 S II
Product description: Features:, ipad/iphone/ipod/NOKIA/HTC/Samsung, Motorola SONY PS3 As well as most USB charging mobile phones and electronic devices, (Please make sure the device's charging specification)Fit for all mobile phone with your own USB charge cable., To charge digital devices: Simply use the matched USB cable to charge digital products., To charge power bank : Use USB cable with Micro connector to charge power bank.
Product feature: 100% Brand New, Input: DC 5V, 1.0A, Output:DC 5.0V,1.0A, Capacity:3.7V/2600mAh, Compatible Brand: For Apple,Samsung, LG ,HTC etc.
Product brand: EPCTEK
Target attributes: Type
Answer: attribute: type
value: external battery
source: product title
attribute: type
value: power bank
source: product description