Three devices from reputable phone makers - the Galaxy A9 Pro, HTC 10 and Z2 Plus - will be heading on a specs and features showdown. Which device is the best? Here's a review.

One feature noteworthy of mentioning first is the devices' battery life. These devices have very large battery capacities, starting with a 3000mAh battery inside HTC 10. The Lenovo Z2 Plus has a bit higher, with 3500mAh. However, the Samsung A9 Pro easily takes the cake with its massive 5000mAh battery.

Moving on to its displays, the Z2 Plus has the smallest screen among the three with its 5.0-inch, 1920x1080 resolution LTPS-technology IPS screen. The HTC 10 comes in second with its slightly bigger 5.2-inch Super LCD5 panel, with a 2560x1440 resolution to boot. The Galaxy A9 Pro has the largest screen with a 6.0-inch, Full HD (1920x1080) Super AMOLED screen.

The Galaxy A9 Pro features a Qualcomm Snapdragon 652, which is intended to be a midrange chip, but still packs in a punch with its eight active processing cores. Both HTC 10 and the Z2 Plus, on the other hand, features the current flagship Snapdragon 820, with 4 high-performance cores.

All devices are shipped with 4 GB of RAM. The Galaxy A9 Pro is only available with a choice of 32 GB of storage, while the HTC 10 has 32 or 64 GB option. With the Lenovo Z2 Plus, there's only a 64 GB option available. Furthermore, only the Z2 Plus doesn't have expandable memory with its lack of an SD card slot - something the two other machines support.

The Galaxy A9 Pro, HTC 10 and Z2 Plus features a 16-megapixel autofocus, 12-megapixel laser autofocus, and 13-megapixel phase-detection autofocus camera, respectively. The A9 Pro and Z2 Plus also has 8-megapixel front camera, while the HTC 10 has a slightly lower 5-megapixel camera, but also has autofocus features.

Adding to the aforementioned battery capacities are fast battery charging capabilities via Quick Charge 3.0. Both HTC 10 and Lenovo Z2 Plus feature USB Type-C connectors, while the A9 Pro is still stuck with the older Micro USB 2.0 standard.

In conclusion, the Samsung Galaxy A9 Pro may be less powerful than the HTC 10 and the Lenovo Z2 Plus, but it features a bigger screen and an enormous battery - a very huge plus on its usability, while still catching up on the features the other two devices have.