Amazon With airlines cracking down on how many portable chargers you can bring on your next flight — and the wattage limit on chargers — keeping your devices juiced up on long flights is going to be even more difficult. American Airlines just announced that portable chargers on board must be visible to the crew at all times (not in overhead compartments) and are limited to two per person. What’s more, they have a 100-watt maximum, and there’s a high chance the charger you own might not meet this requirement. Anker Power Bank Amazon At 87 watts, this power bank and juice up three devices at once and even comes with a built-in USB-C cable, saving you the hassle of carrying anything extra. It can power up smartphones, headphones and even laptops — and the LED light indicator will let you know just how much battery is remaining in this device. It’s portable, easy to use and packs a lot of power for its size. Luckily, Anker has a bunch of chargers currently on sale, and most pass American Airlines’ new rules.…