The Complete Guide: How to Charge the Xiaomi Redmi Portable Battery PB100LZM (model VXN4305GL)

Xiaomi Redmi Power Bank 10000 mAh portable battery (article) PB100LZM, model VXN4305GL) — One of the most popular backup devices for smartphones, tablets and other equipment, and despite its ease of use, many users are faced with questions about how to properly charge this power bank, how long it takes, and why the process sometimes goes slower than expected. Charging errors can shorten battery life or even put it out of action.

In this article, we will analyze all the nuances of charging Xiaomi Redmi PB100LZM — From choosing a charger to diagnosing possible problems, you will learn which cables and adapters are best, how to speed up the process without harming the battery, and what to do if the power bank stopped charging. VXN4305GL, which directly affect the speed and safety of charging.

If you have just purchased this battery or noticed that it began to hold the charge worse – this guide will help to avoid typical errors and maximize the life of the device.

Technical characteristics of Xiaomi Redmi PB100LZM (VXN4305GL): charger

Before charging a power bank, it is important to understand its key parameters that determine compatibility with chargers and the rate of replenishment of energy. VXN4305GL It has a 10,000 mAh lithium polymer battery (real available capacity is around 6,500-7000 mAh due to voltage conversion losses) which affects charging and discharging times.

The main characteristics that need to be considered:

• 🔌 Input voltage/current: 5V/2A (maximum supported standard. Some sources indicate 5V/2.1A, But the difference is uncritical.
• ⚡ Outlet ports: two USB-A supportive 5V/2.4A (one port; and 5V/2A + 9V/2A (Second port with Quick Charge support 3.0).
• 🔋 Battery type: Li-Pol (lithium polymer), sensitive to overheating and deep discharge.
• 📏 Weight and dimensions: 241 s, 147 × 73.6 × 14.2 mm – compactness does not affect charging, but is important for the selection of covers and transportation.

Critical: the power bank doesn't support fast charging at the input. Even if you plug it into an adapter with Quick Charge or Power Delivery, it'll charge at standard speed. 5V/2A. This restriction is incorporated into the device controller.

Exception: Some users report that when using Xiaomi adapters with Dual Port Fast Charging support (e.g., the same as the one used by the company, 33W) Charging time is reduced by 10 to 15 percent, but this function is not officially declared for the model. VXN4305GL.

What charger to charge: the choice of adapter and cable

The correct choice of charger (adapter) and cable depends not only on the charging speed, but also on the safety of the battery. The use of incompatible components can lead to overheating, slow charging or even failure of the controller.

Recommended adapters for Xiaomi Redmi PB100LZM:

• ✅ The original adapter Xiaomi (5V/2A, 10W) — The ideal solution guarantees a stable voltage.
• ✅ Adapters with Quick Charge support 2.0/3.0 (For example, from Xiaomi or Anker – will work in standard mode 5V/2A, But the power supply will provide stability.
• ❌ Adapters with less power 10W (for example, 5V/1A) — charging 2 time-size.
• ❌ Laptop chargers (19V and above – can damage the controller, even if used with adapters.

The cable is just as important: thin or damaged wires create additional resistance, which reduces current.

• 🔗 The original Xiaomi cable (USB-A → USB-C or USB-A → Micro-USB, depending on the adapter).
• 🔗 Supported cables 2A (marking AWG 24/28 Avoid cheap "nouneime" cables.
• 🔗 USB-C → USB-C (if the adapter supports this standard - suitable for modern charging.

⚠️ Note: If you are using an extension cord or USB-Hub, check their maximum power. Many hubs limit the current to 0.5A–1A, Which will significantly slow down the charging of powerbank.

Step-by-step: how to charge Xiaomi Redmi PB100LZM

The process of charging a power bank is simple, but there are a few key points to help avoid errors: Follow this guide for safe and efficient power recharge.

Step 1: Preparation of the device

• 🔋 Check the current power bank charge level with four LEDs on the case. If 1-2 lights are on, the charge is critically low.
• 🧹 Clean up the Micro-USB ports (or USB-C, if you have a modification with such a connector) from dust and debris using a dry brush or compressed air.

Step 2. Connect to the charger

• 🔌 Connect the cable to the power bank, then to the adapter. Don't connect to your computer or laptop — USB-PC ports usually give out less current 1A.
• ⚡ Put the adapter in the socket. The power bank case should light up a red indicator (charging is going) or white (fully charged).

Step 3: Controlling the process

• ⏱️ Full charge time — 5–6 hours when using an adapter 5V/2A. If a less powerful RAM is used, the time will increase to 8–10 hours.
• 🌡️ Watch the temperature of the case. Normal is light heat. If the power bank is hot, turn it off and let it cool.

Step 4: Completion of charging

• 🔋 When all 4 LEDs are permanently white, the charging is complete.
• 📦 Keep the power bank in a cool place (optimally - at 10-25).°C).

⚠️ Note: If the power bank does not charge for more than a day, and the indicators do not burn - this may indicate a fault of the controller or a deep battery discharge. In this case, "resuscitation" is required using a special charger (see "What to do if the power bank does not charge").

How long does Xiaomi Redmi charge? PB100LZM: comparison-table

Charging time depends on the adapter power, the condition of the cable, and even the ambient temperature, and below is a table with approximate values for different scenarios.

Importantly, the first 80 percent of the capacity is charging faster, and the last 20 percent is charging slower, and this is due to the controller's algorithm, which reduces the current to protect the battery.

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If you need to recharge the power bank quickly before exiting, use an adapter 5V/2A and turn it off through 2–3 During that time, the battery will be packed. 60–70% capacity, which is enough for 1–2 smartphone-load.

Typical charging errors and how to avoid them

Many users make common mistakes that shorten the life of Xiaomi Redmi PB100LZM Or they're impairing its performance, and let's look at the most critical ones.

Error 1: Using uncertified cables

Cheap cables can not only slow charging, but also damage the controller due to unstable voltage.

• 🔥 Heating at the connection point with the power bank.
• ⚡ Slow charging (more than 8 hours to 100%).
• 🔌 Periodic disconnection/connection (contact "floating").

Solution: Use original Xiaomi cables or certified counterparts (e.g. Anker, Baseus).

Error 2: Charging at extreme temperatures

Lithium polymer batteries are sensitive to temperature:

• ❄️ Low 0°C: Chemicals slow down, charging goes poorly.
• 🔥 Above 40.°C: Risk of battery degradation and even bloating.

Solution: charge the power bank in room conditions (optimum - 15-25)°C).

Error 3: Storage in a discharged state

If you leave the power bank discharged for several months, the battery can fall into a deep discharge, after which it will be difficult to “reanimate”.

Solution: before long storage, charge the device to 40-60% and disconnect. Recharge every 3-6 months.

Mistake 4: Using Powerbank while Charging

Some users plug the smartphone into the power bank while it charges itself, which puts a double load on the controller and can cause overheating.

Solution: First, fully charge the power bank, then use it to power other devices.

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Avoid charging Xiaomi Redmi PB100LZM from USB-ports of TVs, consoles or car adapters with a voltage higher 5V. This can cause the power controller to fail.

How to extend the battery life: tips for operation

The average lifespan of a lithium polymer battery in a power bank is 300 to 500 charge/discharge cycles, but if used correctly, this can be increased by 20 to 30 percent.

1. Avoid full discharge and recharge

The optimal charge range for battery life is 20-80%, and constant charging to 100% and discharge to 0% accelerates degradation.

Tip: if you use the power bank regularly, recharge it with 2-3 burning indicators (about 40-60% of capacity).

2. Store correctly

If you are not planning to use the device for several months:

• 🔋 Charge to 40-60%.
• 📦 Place in a dry place with a temperature of 10–25°C.
• 🔄 Check the charge level every 3 months and recharge if necessary.

3.Use quality accessories

As mentioned, cheap cables and adapters can be harmful. Investing in certified accessories is cheaper than buying a new power bank.

4. Avoid mechanical damage

Blows, falls and pressure on the body can damage the battery, for example, if you wear a power bank in a backpack, place it in a soft case.

5. Battery calibration

Every 2-3 months, perform a full cycle of discharge / charging:

1. Discharge the power bank before the automatic shutdown (all indicators will go out).
2. Charge to 100% without interruption.

This helps to reset controller errors and display the charge level more accurately.

What to do if Xiaomi Redmi PB100LZM Not charged: diagnosis and solutions

If your power bank stops charging, don’t panic – 80% of the time, the problem is solvable. Below are step-by-step diagnostics and troubleshooting methods.

Step 1. Check the cable and adapter

• 🔌 Connect another device (like a smartphone) to the same adapter and cable. If it's charging, the power bank is a problem.
• 🔄 Try a different cable and adapter (preferably original).

Step 2. Check the ports.

• 🔍 Check the Micro-USB connector (or USB-C) on the powerbank for dirt, oxidation or damage.
• 🧲 If the contacts are oxidized, gently clean them with a cotton swab soaked in alcohol.

Step 3. Check the indicators

• 🔋 Press the charge check button. If the lights don't burn at all, the battery is dead or malfunctioning.
• 🔥 If the indicators flash red - protection against overheating or short circuit has worked.

Step 4. Try resuscitation.

If the power bank is completely discharged and does not respond to charging:

1. Put him on the adapter. 5V/2A Leave it on 12–24 hour.
2. If the lights don’t turn on after a day, try using a charger with the “wake-up” function (for example, iMax). B6 similar).

Step 5. Contact the service

If nothing helps, the following problems may occur:

• 🔋 Failure of the charging controller (requires replacement of the board).
• 🔥 Battery bloating (dangerous! Stop using immediately).
• 🔌 Breaking the chain inside the case (needs disassembly and soldering).

The cost of repairs in the service center is from 800 to 2000 rubles, depending on the breakdown.

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If the power bank is charging but discharges quickly when in use, try resetting the controller: completely discharge it, then charge it to 100% without interruption. Repeat the procedure 2-3 times. This can restore the correct operation.

Frequently Asked Questions (FAQ)