HSABAT 1pc 1680mAh Intelligent Charging Battery for DJI Spark Drone Part Intelligent Flight - AliExpress
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
Amazon.com: DJI 2X 1480 mAh Intelligent Flight Battery for Spark Drone, Basic Pack (43222-5656) : Toys & Games
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
Amazon.com: Hanatora Battery Charger with LCD Display for DJI Spark Drone,4 in 1 Rapid Multi Parallel Charging Hub Accessories : Toys & Games
DJI Spark Intelligent Flight Battery - DJI
DJI CP.PT.000870 Battery Charging Hub for Spark Quadcopter - Newegg.com