Anker 737 vs Baseus 65W Power Bank

When comparing power banks, most spec sheets lead with milliamp-hours (mAh) — but that number is almost meaningless on its own. What actually determines how many times you can charge your laptop is watt-hours (Wh). Wh accounts for the voltage conversion that happens inside the bank, so it is the honest measure of stored energy. The Anker 737 holds 86.4 Wh; the Baseus holds 74 Wh. A 2021 MacBook Pro 14-inch has a 70 Wh battery. In practice, after accounting for conversion losses (typically 10–15%), you will get roughly one full laptop charge from either bank, with the Anker having meaningfully more headroom for a second partial charge or for simultaneously topping up other devices.

The 140W USB-C Power Delivery on the Anker 737 is not just a marketing number. Modern USB-C PD is negotiated between the charger and the device, so the laptop draws exactly what it needs up to the port maximum. The Anker 737 is compatible with the full fast-charge spec of Apple MacBook Pro (both M2 and M3 models), Dell XPS 13 and 15, Lenovo ThinkPad X1 Carbon, HP Spectre x360, and Microsoft Surface Pro. The Baseus at 65W will charge all of those laptops — just more slowly. A MacBook Air M2, which has a 52.6 Wh battery and charges at 30W natively, will actually charge at nearly the same speed from either bank. The 140W advantage matters most for high-performance laptops that accept 90W or 100W charging.

Airline carry-on rules are a genuine consideration with both of these banks. The FAA and most international aviation authorities (IATA guidelines) allow lithium-ion power banks in carry-on luggage up to 100 Wh without airline approval, and up to 160 Wh with airline approval — but power banks are prohibited entirely in checked luggage regardless of capacity. The Anker 737 at 86.4 Wh and the Baseus at 74 Wh both fall under 100 Wh, so both are permitted in carry-on bags without needing to ask. However, the mAh figures (24,000 and 20,000) can cause confusion at security checkpoints where agents sometimes misread specs. It helps to have the product page or box handy showing the Wh figure, since that is the number that matters for compliance.

The 190g weight difference between these two banks is larger than it sounds. At 630g, the Anker 737 is closer in feel to a hardcover book; at 440g, the Baseus is more like a filled water bottle that you stop noticing. On a day trip or weekend trip where you are also carrying a laptop, cables, and chargers, that difference adds up. The Anker's digital percentage display is a practical advantage over the Baseus's LED dot indicator — knowing you have 23% left versus guessing "one LED means low" reduces range anxiety meaningfully on a long travel day.

The honest buying guide comes down to two questions: Does your laptop accept more than 65W charging, and do you regularly need to charge two devices at full speed simultaneously? If both answers are yes, the Anker 737 earns its place in the bag. If your laptop is a MacBook Air, an ultrabook, or any device that caps at 45–65W — or if you mostly charge your phone and only occasionally plug in your laptop — the Baseus 65W delivers most of the real-world capability in a lighter package. Most people buying a first laptop power bank will be perfectly served by the Baseus.