Xiaomi Redmi Note 4: how much holds the charge in 2026 – honest tests and tips

Xiaomi Redmi Note 4 is still one of the most popular budget smartphones in the aftermarket, despite the release in 2017. The main question owners — how much charge does this device hold after 5-7 years of operation? In this article, we will analyze the actual autonomy of the model, factors affecting the time of operation, and give practical recommendations for extending the life of the battery.

The standard Redmi Note 4 battery pack has a capacity of 4,100 mAh, which is an impressive number for its time, but over the years, capacity inevitably declines. We tested the smartphone in different scenarios, from watching videos to intense games, and also measured the consumption in standby mode. The results may surprise!

It’s important to understand that the lifetime on a single charge depends not only on the battery status, but also on the firmware version, the apps installed, and even the ambient temperature. If your Redmi Note 4 runs too fast, you’ll find diagnostic instructions and ways to restore autonomy in this article.

Official Battery Specifications of Redmi Note 4

The manufacturer stated the following parameters for the Xiaomi Redmi Note 4 battery (model MZB5860LI):

• 🔋 Capacity: 4100 mAh (typical), 4000 mAh (minimum)
• 🔌 Type: Lithium-polymer (Li-Po), non-removable
• ⚡ Fast Charging: Quick Charge 2.0 (5V/2A, 9V/1.67A)
• 📱 Full charge time: ~2 hours (with the original ZU)

On paper, these characteristics were sufficient. 1.5-2 But the actual tests showed different numbers, like the GSMArena review, the smartphone worked. 10 hours 42 minutes in the test for autonomy (web surfing over Wi-Fi at brightness) 200 For comparison: modern public sector employees with a battery 5000 The PMH is barely above that result.

The Redmi Note 4’s key feature is fast charging support, but only when using the original adapter. With third-party RAM, the charging speed drops to the standard 5V/1A, and the battery recharge time increases to 3-4 hours. This is important to consider when buying a used device: often sellers do not specify whether the “native” charger comes with the package.

Real tests of autonomy in 2026

We ran a series of tests on the Redmi Note 4 with MIUI 12.5 (Android 7.0) firmware and a 4-year battery, and the results showed that even with a worn-out battery, the smartphone remains competitive:

Critical: When the battery wears more than 40%, the smartphone starts to shut down at 20-30% charge due to incorrect level display, due to the degradation of the power controller, only replacing the battery or calibrating through the engineering menu solves the problem.

Interesting fact: in Ultra Battery Saver mode (on at 5% charge), the Redmi Note 4 can last another 3-5 hours only on calls and SMS. This feature disables all background processes, leaving only basic phone functionality.

⚠️ Note: If your smartphone is running out of power 4-5 The problem is not with the battery, but with the software. Most often, apps with aggressive background activity (such as Facebook, TikTok) or viruses are to blame. → Annexes → Working.

How to check the wear of the battery

To determine the real state of the battery Redmi Note 4 can be several ways:

1. Using the Engineering Menu: Enter the Phone app code ##4636##Go to the Battery Information tab See Health parameter Optimal value is 100%, critical value is below 70%.
2. Using the AccuBattery app: 📊 Analyzes charging/discharge cycles 🔋 Shows real capacity in mAh ⚡ Estimates the wear rate

If the battery capacity has dropped below 2500 mAh, it needs to be replaced immediately.

• 📉 Losing 50% of charge in 1 hour in standby mode

Operating time less than 3 hours with active use |

The smartphone turns off at 20-30% charge |

Battery swollen (see body)|

Charging takes more than 4 hours |

Top.-5 causes of rapid discharge and how to eliminate them

Even with the new battery, the Redmi Note 4 can run out too quickly.

The default MIUI actively syncs data to Xiaomi servers, which eats up to 15% of the charge per day, to turn off the extra sync:

1. Go to Settings → Accounts and Synchronization
2. Select a Mi Account Account
3. Turn off sync for unnecessary data (notes, calendar, browser)

💡

If your smartphone is running out at night by more than 10%, turn on Settings → Battery → Battery Optimization → Sleep mode. This will turn off background activity during inactivity.

How to prolong the life of the battery: practical tips

Compliance with a few simple rules will help to keep the battery capacity of Redmi Note 4 at the level of 80-90% even after 3-4 years of use:

• 🔌 Charging: Use only original or certified RAM with Quick Charge support 2.0. Avoid “night” charges – it is optimal to keep the charge level in the range 20-80%.
• 🌡️ Temperature: Do not operate your smartphone in temperatures below 0°C and above 35°C. Overheating by 10°C reduces battery life by 2 times.
• 🔄 Cycles: Try not to drain the battery to 0% and not to charge to 100% daily.
• 📵 Storage: If you don’t use your smartphone for a long time, store it with a charge 40-50% off-set.

To calibrate the battery controller (if the smartphone does not show the percentage of charge correctly), follow the following steps:

1. Charge your phone to 100% and hold on charging for another 1 hour.
2. Turn off charging and use your smartphone before automatically turning off.
3. Don't turn it on right away! wait 5-6 hours, then charge to 100% without interruptions.
4. Repeat the cycle 2-3 times.

⚠️ Note: If after calibration the smartphone still turns off when 20-30% The calibration won't help, it requires a battery replacement. The average cost of a new battery for the Redmi Note is not enough. 4 into 2026 year — 800-1200 ruble.

Comparison with competitors: who holds the charge better?

At the time of its release, the Redmi Note 4 was one of the leaders in the autonomous market in its price segment, and let’s compare it to the main competitors of 2017 and modern public sector:

As you can see from the table, the Redmi Note 4, even after 7 years, is not much inferior to modern public sector employees in terms of operating time. The main advantage of new models is more energy-efficient processors (for example, the Helio G35 in Redmi 9A vs. the Snapdragon 625 in Note 4).

An interesting nuance: Redmi Note 4 with MIUI 10+ firmware consumes 10-15% less power in the background than with MIUI 8/9. This is due to an improved process control algorithm. If your smartphone is still on the old version, the update can significantly improve autonomy.

💡

Despite its age, the Redmi Note 4 remains one of the most autonomous budget smartphones thanks to the balance of battery capacity and energy efficiency of the Snapdragon 625.

Frequent questions about the Redmi Note 4 battery