Stuffcool is an Indian accessory manufacturer that needs no introduction; the brand has an exhaustive range of power banks and chargers, and I use its products quite a bit. The Major Ultra continues to be a good choice if you want a 20000mAh battery that hits 65W over the USB PD protocol, but if you need something smaller, you should take a look at the Mega 40.
The Mega 40 is one of the smallest power banks around, and it easily fits in your palm. Unlike the rest of Stuffcool’s products, the power bank has a dark grey aesthetic that’s rather distinctive. If anything, it reminds me of UGREEN’s 145W power bank and the recent Nexode 200W power banks — the design similarities are uncanny, including the window located up top that houses an LED panel.
What I like about the power bank is that it has curved edges, and the design is much more elegant than the blocky options in the Major Ultra series. The sides have a textured pattern that makes it easy to hold the power bank, and it’s a thoughtful addition. I think Stuffcool should just use the Mega 40’s design as the foundation for future products; having used all of the brand’s power banks thus far, I can safely say that it has the best design.
The Mega 40 has a button on the side that switches on the LED panel, and unlike the Nexode 200W series or other costlier options, you don’t get much in the way of usability — the panel just shows remaining battery level, and whether the power bank is charging other devices (out), or the internal battery (in).
In spite of its diminutive size, the Mega 40 has a 10000mAh battery, and the best part is that it can charge two devices — both at 20W at the same time. That gives it a definite edge over other smaller power banks in this category, and with two USB-C ports, you can realistically charge two phones at once. I used it with the Pixel 9 Pro XL, Xiaomi 14 Ultra, and iPhone 16 Pro Max, and it did a great job in this regard.
Each USB-C port is able to go up to 20W total over the USB PD protocol (12V/1.67A), and in my testing, I found that it went up to 18W on the Pixel 9 Pro XL. While it’s not on the same level as 65W charging that you get with bigger power banks, the Mega 40 does a good job in its own right, and if you’re using a Galaxy phone, iPhone, or Pixel, it holds up pretty well.
I used the Mega 40 for just over two months, and I didn’t see any issues. It delivered decent overall efficiency, and was able to charge the Pixel 9 Pro XL and have enough left over to use with accessories. The size means you can take it just about anywhere, and the dual USB-C ports are a welcome addition.
The Mega 40 is available on Amazon India for ₹2,018, and that is a good value when you consider there are two USB-C ports. It isn’t the fastest around, but if you want something you can just throw in a bag and use anywhere to charge your phones, it is a good choice.
The Mega 40 is a tiny power bank with huge potential. The battery is big enough to charge any phone, and you get 20W out of each USB-C port, going up to 40W in total.