Get it! Powered by a 6A lithium battery of its own, the 12V smart charger is controlled using a built-in LED display that shows the current, voltage, temperature, battery power, and more in real time.

So not only will the MH-CD42 charge your lithium-ion cells ... off for when it thinks you’ve finished using it; a feature inherited from its USB battery bank origins. In practice, that means ...

Recharging that battery can take about four hours, if using the slowest available charging methods. In best conditions, though, you can fast charge your iPhone from empty to 50% in 30 minutes ...