How you can fix dead DJI Spark batteries using a 9V battery, a CP2112 board, and DJI Battery Killer (should work for other batteries too) : r/drones
Genuine DJI Spark Intelligent Flight Battery - Brand new in original box | eBay
Amazon.com: Multiple Battery Charger with 4 Channel Rapid Balance Charger Ports and 2 USB Ports for DJI Spark Drone Battery and Remote Controller 6 in 1 : Toys & Games
DJI Spark Battery Hub and Multi-charger | FixaCrash
New Released! Spark Accessories You Should Have
How to Charge a DJI Spark from an External Battery Pack | Voltaic
DJI Spark battery exploded during flight : r/drones
DJI Spark Intelligent Flight Battery - DJI
Amazon.com: DJI CP.PT.000789 Spark Intelligent Battery, Black : Toys & Games
HSABAT 1pc 1680mAh Intelligent Charging Battery for DJI Spark Drone Part Intelligent Flight - AliExpress
Original 1480mAh 16.87Wh Battery For DJI Spark Spark Quadcopter MB1 - AliExpress
Original DJI SPARK Drone Intelligent 1480 mAh Flight Battery 16mins Flight Time - Drone Abroad
DJI Spark Flight Battery (Open Box) Level A - Part 3 | Camrise