Best Smartphones with Reverse Wireless Charging

Reverse wireless charging (also known as Wireless PowerShare) allows you to use your phone's battery to charge other Qi-compatible devices, such as wireless earbuds or smartwatches. In 2026, this feature has matured from a gimmick to a genuine utility, with improved speeds and better heat management.

How it Works

The induction coil used for wireless charging is "reversed," allowing it to output power instead of receiving it. However, because of the small size of the coil, efficiency is typically around 50-60%. This means you lose more battery than the target device gains.

1. Samsung Galaxy S26 Ultra (15W Reverse)

Samsung led the way with this feature. The S26 Ultra offers "Fast Wireless PowerShare," capable of up to 15W output. This is enough to charge a pair of Galaxy Buds from 0 to 50% in about 20 minutes, which is faster than most competitors.

2. Google Pixel 10 Pro (Battery Share)

Google’s "Battery Share" is highly intelligent. It automatically stops if your phone’s battery drops below a certain percentage (configurable by the user). Its 10W output is stable and generates less heat than Samsung’s higher-wattage solution.

3. Xiaomi 16 Pro (High-Speed Reverse)

Xiaomi has pushed the limit with 20W reverse wireless charging. While it requires perfect alignment and can heat up the phone significantly, it is the fastest way to charge another phone in an emergency without a cable.

When to Use It (and When Not To)

• Do Use It: For small accessories like earbuds, watches, or trackers.
• Do Use It: In emergencies to give a friend enough power (1-5%) to send a text or make a call.
• Don't Use It: To fully charge another phone; the heat generated will degrade your own battery over time.
• Don't Use It: If your phone is already hot from gaming or sunlight.

Comparison Table: Reverse Charging Speeds

Summary

The Samsung Galaxy S26 Ultra offers the best balance of speed and software control, while the Google Pixel 10 Pro is the safest choice for preserving your own battery health.