Here are the best value-for-money portable chargers right now (US), grouped by common uses so you can pick the one that fits you best.

Top picks (short summary)

• Best overall value / great for phones + occasional laptop: Anker 737 PowerCore 24K — 24,000 mAh, PD 3.1 up to 140W (two USB‑C + USB‑A). Excellent balance of capacity, speed and price when on sale. (anker.com)
• Best for frequent laptop users / power users: Zendure SuperTank Pro (or similar 100W/PD 3.1 packs) — ~26,800 mAh, 100W USB‑C outputs and OLED status screen; heavier but great for multi‑device travel. (powerbank.zendure.com)
• Best compact 10,000 mAh (budget + pocketable): INIU 10,000 mAh — slim, very affordable, solid real‑world output for phones and earbuds; consistently recommended by reviewers for value. (tomsguide.com)
• Best ultra‑compact / pocket booster: Zendure SuperMini (5,000 mAh or 10,000 mAh variants) — tiny 20W (or 5K/10K) options that are very cheap and extremely portable. Good for one full phone top‑up. (androidpolice.com)
• Best high‑capacity travel/workhorse: Anker Prime / Anker 27K+ / other 20K–28K packs with 100W+ PD — if you need many phone charges and laptop support, these give the best watts per dollar when on sale. (Compare Anker/Zendure/Cuktech/Alogic options.) (anker.com)

Why these are “value” picks

• They give a good combination of usable energy (Wh), fast charging (USB‑C PD), multiple ports and reliable safety features for typical prices. Lots of reviewers and deal sites have flagged these models as best buys when discounted. (androidcentral.com)

Quick buying rules — what matters most

• Wattage (USB‑C PD): If you want to charge a laptop, check PD wattage (65W is fine for many laptops; 100–140W required for fast charging some 16" MacBook Pros). For phones, 20–30W is usually plenty. Cite: product pages/reviews for each pack. (anker.com)
• Capacity vs usable energy: mAh ratings are given at cell voltage (usually 3.7V); the useful Wh for your device is lower after conversion and losses. To compare across models, convert mAh to Wh or look for Wh on the spec sheet. (faa.gov)
• Airline rules (travel): US DOT / FAA: power banks ≤100 Wh are allowed in carry‑on; 101–160 Wh require airline approval (and usually a limit of two); >160 Wh are generally forbidden as spares. Always keep power banks in carry‑on and check your airline for recent policy changes. (faa.gov)
• Weight/portability tradeoff: higher capacity + higher PD = heavier. Choose a 10K–12K pack for pocketable daily carry, 20K–27K for travel/laptops. See reviews above for specific weight notes. (androidauthority.com)

Where to buy and price expectations

• These chargers often go on sale; the “value” winners are frequently sold for $20–$40 (small 5K–10K models) and $60–$130 (20K–27K high‑watt models) during deals. Watch Amazon, manufacturer stores (Anker, Zendure), and trusted deal sites. (androidcentral.com)

If you want, I can:

• Recommend the single best pick for your exact needs (phone only, phone + Switch, laptop + phone, travel) and budget, and include current prices/links — I can look up live deals right now.