Amazon.com: Package of 4 D-Cell Battery Holders for Parallel or Series Connections : Electronics
Amazon.com: Hanatora 3 in 1 Car Charger with Dust Cover for DJI Spark Drone Battery and Remote Controller,Triple Output (1 xUSB + 2 x Battery),Dual Battery Parallel Charger Adapter Accessories : Toys & Games
Amazon.co.jp: 10 Set of fireproof T Plug Connector RC ESC Battery, Parallel import goods : Toys & Games
Amazon.co.jp: Parallel Charging Board, Parallel Charging Board XT30 Plug 20A Short LiPo Battery Charger with Connection Cable for RC Toy Upgrade Parts : Toys & Games