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Mobile gaming: What's more important, performance or battery life?

Can relatively slow phones with a large battery, like the Xiaomi Redmi 15, actually be a good choice for budget-conscious gamers?
Can relatively slow phones with a large battery, like the Xiaomi Redmi 15, actually be a good choice for budget-conscious gamers?
Gamers who want to enjoy titles in their full glory on the go need a powerful phone. Or is it more sensible to focus on long battery life in order to play through the entirety of long trips?

Smartphone gaming is a cool thing and constantly evolving. Thanks to cloud gaming and increasingly powerful mobile chipsets, playing AAA titles on a phone that were previously only available on consoles or PC is now possible. Of course, casual games also exist and should run on nearly every phone.

But do you even need loads of power? Or is a phone like the Xiaomi Redmi 15 5G, which we recently reviewed for, not sufficient for gamers?

Our gaming test with the Xiaomi Redmi 15 5G

Some requirements for basic gaming are certainly met. A 144Hz screen with Full-HD resolution, 8GB RAM and an accurate touchscreen are onboard. However, if you look at benchmarks, the affordable Redmi 15 5G is not a gaming phone. It only manages 20 fps even at low settings in Genshin Impact, while PUBG Mobile is only playable at very low settings.

Xiaomi still has one trick up its sleeve

What the Redmi 15 does offer is a very long battery life under load. We measured well over 7 hours, so the handset is suitable for long gaming sessions away from power outlets and power banks. If you want to play less demanding games or use cloud gaming, you can get a pretty good bargain here.

It depends on the type of gaming

Whether it is important for a phone to offer lots of gaming performance really depends on what type of gamer you are. If you want to play the latest games without an internet connection and input lag, buying an expensive phone might be worth it.

However, if you mostly play simple games on the go and don’t want to depend on a nearby power outlet or recharge with a power bank, the Xiaomi Redmi 15 5G offers extremely long battery life, which can be very practical on long trips.

More info on the Xiaomi Redmi 15 5G

Choosing a new smartphone sometimes comes down to individual taste, but some hard facts can help with this difficult decision. Please check out our detailed review of the Xiaomi Redmi 15 5G in order to find out how the device fared outside of gaming.

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> Expert Reviews and News on Laptops, Smartphones and Tech Innovations > News > News Archive > Newsarchive 2025 10 > Mobile gaming: What's more important, performance or battery life?
Florian Schmitt, 2025-10-25 (Update: 2025-10-25)