With the MediaTek Helio G81 Ultra an SoC with a maximum clock speed of 2 GHz is used. It does not always achieve smooth system operation and is also not ideal for AI calculations. Overall, however, it is on a par with similarly priced devices and is sufficiently fast for simple tasks.
There are no advantages for the Redmi 15C 4G in terms of memory: The eMMC flash ensures rather long loading times and relatively slow data transfers.
The heat build-up on the casing is never critical. Even after prolonged load, the processor remains similarly powerful, as the 3DMark stress tests show us.
The mono speaker on the bottom edge of the phone can get quite loud, but is very treble-heavy and therefore sounds quite thin. External audio devices can be connected via a 3.5mm audio jack or via Bluetooth. There are not many exotic Bluetooth audio codecs, but the most common variants are available.
The battery has grown significantly to 6,000 mAh. Great runtimes of up to 21 hours are possible in our WLAN test. The Redmi 15C 4G clearly beats other similarly priced phones. The phone can be charged with up to 33 watts, and a full charging cycle takes just over 2 hours.