Each Alta X flight requires two 12S batteries, so you'll need a charger like this that can charge two at a time.

This battery charger is a dual output balancing charger with an integrated power supply. It can charge two Alta X Flight Packs at once at a max rate of 1200W per channel, in less than two hours (for fully depleted batteries).

We include all necessary cabling and accessories to allow users to charge two Alta X Flight Packs at once.

Features

Dual Charging
Integrated power supply
Cell balancing
Storage charge/discharge mode
Protection against: Overcurrent, under-voltage, short circuit, and reverse polarity
Adjustable charge rate (across voltage inputs)
Automatic voltage switching (110V-240V)