Bypass charging is a feature that routes power from your charger directly to your device’s processor and screen, skipping the battery entirely. Instead of charging the battery and then drawing power from it, the device runs straight off the wall outlet. This reduces heat, prevents unnecessary battery wear, and is especially useful during heavy tasks like gaming.
How Bypass Charging Works
Normally when you use your phone while it’s plugged in, incoming power charges the battery while the battery simultaneously powers the device. This creates a charge/discharge cycle that generates heat and gradually degrades the battery’s chemistry. Bypass charging breaks that loop by splitting the incoming power into two paths: one goes to the battery for charging, and the other goes directly to the device’s internal components. In some implementations, the battery is taken out of the equation completely, meaning zero current flows through it while you use the device.
The result is a cooler phone during intensive use. Lithium-ion batteries degrade from two main types of stress: charge/discharge cycles and heat cycles. Gaming while charging hits the battery with both at the same time. Bypass charging eliminates or significantly reduces both stressors during that session.
Which Devices Support It
Bypass charging started as a niche feature in gaming phones and has since spread to mainstream flagships. Asus ROG phones were among the first to build it in as a dedicated mode, and models like the ROG Phone 9 Pro continue to support it. Samsung introduced a version called “Pause USB Power Delivery charging” on Galaxy devices, including the Galaxy S24 lineup. Several other Android manufacturers have added similar features under different names.
Samsung’s implementation has specific hardware requirements. It only activates when a USB Power Delivery charger rated at 25W or higher is connected, and that charger must support PPS (Programmable Power Supply), a protocol that allows fine-grained voltage and current adjustments. The battery also needs to hold at least a 20% charge before the feature kicks in, and a game must be running. If any of those conditions aren’t met, the phone charges normally.
On Asus ROG phones, the feature is more straightforward. You toggle it on in settings, and the phone draws power from the charger while gaming without routing current through the battery. The charger that ships with the phone typically meets the wattage requirements.
Bypass Charging vs. Laptop Power Management
If this concept sounds familiar, it’s because laptops have done something similar for years, though the implementation differs. Most laptops, when plugged into AC power, draw electricity from the charger to run the system without cycling through the battery. The battery sits idle at its current charge level. When the system demands more power than the charger can deliver (during a heavy workload, for instance), the laptop briefly taps the battery for the extra wattage, but this is minimal.
Some laptops handle this less gracefully. Lenovo laptops, for example, once had a BIOS behavior where the system would charge the battery to 100%, disconnect from the charger, drain to 97% on battery power, then reconnect and charge back to 100%, repeating this cycle constantly. This rapidly increased the battery’s cycle count for no practical benefit. A later BIOS update fixed it by holding the charge steady at 100% without disconnecting, which is closer to true bypass behavior.
The key difference with smartphones is that bypass charging on phones typically requires dedicated hardware circuitry to reroute power around the battery. On laptops, the power management controller usually handles this routing by default. That’s why bypass charging is a “feature” on phones but has been standard behavior on most laptops for years.
Why It Matters for Battery Lifespan
Every charge and discharge cycle chips away at a lithium-ion battery’s total capacity. A full cycle from 0% to 100% and back is the most damaging, but even partial cycles add up. Heat accelerates this degradation. When you game on a phone that’s simultaneously charging, the battery endures both stressors at once: it cycles while running hot from the processor’s workload and the heat generated by charging.
Bypass charging removes the battery from that equation. No current flows through the cells, so no cycle is recorded and no charging heat is added to the already-warm device. As one widely shared observation in the ROG Phone community puts it: virtually everything you do with your phone slowly wears out the battery, except bypass charging. That’s a slight exaggeration, since the battery still ages from calendar time and ambient temperature, but the point stands. If you regularly game for hours while plugged in, bypass charging can meaningfully extend how long your battery holds a useful charge over the life of the phone.
How to Enable It
On Samsung Galaxy phones, go to Settings, then Battery, and look for “Pause USB PD charging when gaming.” The option only appears on supported models. Once enabled, it activates automatically when you launch a game with a compatible charger connected and at least 20% battery remaining. You won’t see the battery percentage climb during your session, which is expected.
On Asus ROG phones, the setting is in the Armoury Crate app or the battery settings menu, labeled as “Bypass charging.” Toggle it on before starting your game. The phone will draw power from the charger and leave the battery alone.
For either platform, make sure you’re using the charger that came with the phone or one that matches its power delivery specs. A basic 5W charger won’t supply enough wattage to run the phone’s processor at full load without battery assistance. If the charger can’t keep up, the phone will pull from the battery regardless of your settings.
Portable Power Stations Use It Too
Bypass charging isn’t limited to phones and laptops. Portable power stations use a similar principle. When plugged into a wall outlet, the incoming power splits: one path charges the internal battery while a bypass path supplies connected devices directly. This lets you run appliances off the power station’s outlets without waiting for the battery to charge first, and it reduces wear on the battery cells during pass-through use. The concept is identical to what happens in a phone, just at a larger scale with higher wattages.