Tronsmart Presto - Review 2022

The 10,400mAh Tronsmart Presto has lots of the features we look for in a battery pack, like USB-C input/output and Qualcomm Quick Charge 3.0 fast charging, all for just $26.99. And then why doesn't it earn our Editors' Selection like the similarly priced Xiaomi Mi Power Depository financial institution Pro? A beefy, overly long build makes the Presto less portable than the Pro. If you don't heed carrying it around in a bag and you take USB-C devices that need charging, however, it's a nifty pick.

Pattern and Features

The Presto is more than about function more form. It'due south a elementary black plastic rectangular slab that measures 6.4 past two.3 by 0.7 inches (HWD) and weighs 6.ane ounces. It's actually lighter than the Xiaomi Mi Ability Banking company Pro (5.ane by 2.9 by 0.5 inches, 7.0 ounces) and the Anker PowerCore 10000 (iii.9 by 2.five by 0.nine inches, seven.0 ounces), but much longer, making information technology difficult to fit in your pocket. This isn't a big bargain if you're willing to behave the Presto effectually in a bag or purse, but for batteries 10,000mAh and below, portability is one of the first things we expect for.

The charging ports be found on the top edge of the battery. You get a USB-C input/output for charging the bombardment itself, besides as other devices at 5V/3A. There'due south also a Qualcomm Quick Charge 3.0 USB-A output. The right side is dwelling to a power/status button. Battery and charging status is indicated by iv white LEDs on top of the battery.

A USB-C to USB-A charging cable is included. Yous can use it to charge the bombardment itself or compatible USB-C devices. Oddly, Tronsmart says the HTC x isn't compatible with the battery, only it worked with a number of phones nosotros tested information technology with including the LG V30+ and Apple iPhone X. In that location's no pass-through charging, which allows y'all to charge the bombardment at the same fourth dimension as it's charging another device.

Operation and Conclusions

The Presto has a 10,400mAh capacity, letting y'all charge most phones around three times and the average tablet about twice. For testing, nosotros connected the fully charged Presto to a depleted Galaxy Note 8 and had it stream full-screen video over Wi-Fi at maximum brightness. The battery lasted an impressive 25 hours, 50 minutes, nearly ii hours longer than the PowerCore (23 hours, 44 minutes LTE video streaming on ZTE Axon 7). That said, neither came close to matching the Mi Power Bank Pro, which lasted 33 hours, 42 minutes.

The USB-C charging input/output port worked well, automatically identifying what device it was plugged into and if it should be charged or not. We never encountered an outcome where a phone attempted to charge the bombardment, equally sometimes happen with USB-C ports.

Charging was also fast. When we measured current, the USB-A port had a variable 9V/1.8A output, consistent with Qualcomm'due south Quick Charge 3.0 standard that dynamically varies voltage between 3.2V to 20V.

Overall, the Presto has plenty of juice to keep phones and tablets powered all day, supports fast charging, and works with USB-C devices. If only it were a bit smaller, it would be a contender for our Editors' Choice award. As it stands, the $30 Xiaomi Mi Power Depository financial institution Pro offers the all-time combination of price, power, and portability.