Purchased August 25, 2019. Crashed DJI SPARK so no longer needed. Allows charging of SPARK batteries in the field in about 40 minutes. Smatree SP90 DJI spark battery charger, quick charge 3 spark batteries simultaneous. You can charge SP90 about 3.5-4h with 8.7V/4A power adapter. Big Capacity: 92Wh Power, fully charged 3 Spark batteries simultaneously about 40-50 {url removed} can fully charge up to 6 spark batteries before recharging Quick charge: Fully charge power station about 3.5-4 hours with 8.7V/4A quick charger, saving much time Big saving: This power bank equals 6 PCS spark batteries in power capacity. can save much money in purchasing original batteries Portability : With this power bank, you can charge your Spark battery anywhere and anytime With 5V/2A USB output, you can charge remote controller, cellphone, iPad