This battery is compatible with all models of the iPhone 6S
Model(s): A1633, A1688, A1700
Capacity: 2250mAh (Translation: Phone will last 31% longer than normal)
iPhone 6S Replacement Battery
Also available through Amazon Canada here.
Kit includes: 1x Battery, 1x 8-piece toolkit to disassemble and reassemble, and two sticks of adhesive to stick the battery into the phone.