I also have Anker gear and it all works great. For my house I keep about a dozen chargers going with AA, AAA and cr123a batteries as well as about a dozen flashlights or lantern lights for emergencies.
For battery chargers you should have a smart charger that monitors the battery level and provides just enough juice to charge it. This helps you batteries last much longer in terms of number of charges. I use this charger from La Crosse, it shows the battery level in the LCDs which helps diagnose battery problems:
And this one from NiteCore which can also charge 18650 & cr123a batteries:
Btw these are 120 VAC chargers, for field use you will need an inverter in a vehicle.
Big Bears Don't Tree