Smaller battery packs are great for refiling phones and tablets, but if you need to keep a laptop juiced up while you're far from an outlet, you'll need something larger. For this guide, we tested portable chargers with at least a 20,000mAh (74Wh) capacity, but kept the upper limit below 27,000mAh (99Wh), since that's about the maximum size allowed by the TSA in carry-on luggage. Some laptop power banks sport extra features like wireless charging or an AC plug so you can power small devices such...
Smaller battery packs are great for refiling phones and tablets, but if you need to keep a laptop juiced up while you're far from an outlet, you'll need something larger. For this guide, we tested portable chargers with at least a 20,000mAh (74Wh) capacity, but kept the upper limit below 27,000mAh (99Wh), since that's about the maximum size allowed by the TSA in carry-on luggage. Some laptop power banks sport extra features like wireless charging or an AC plug so you can power small devices such...
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