Macworld At a glance Expert’s RatingProsInternal batteryProtective caseMore efficient than a wireless power bankSlimmer than rival battery casesConsBattery offers less power than rivalsMore expensive than rivalsOur VerdictThe Mophie Juice Pack battery case provides 50% back-up power and protection for the iPhone 15. The internal 2,400mAh battery is one of the lowest-capacity options but the benefit of this is a much-reduced hump at the back of the slim case, in comparison to bulkier 5000mAh capacity battery cases. Price When Reviewed$99.95 Best Prices Today: Mophie Juice Pack for iPhone 15 Ret…