The Impact of Low Temperatures on Used iPhone Batteries

The performance of lithium-ion batteries in used iPhones is significantly affected by temperature, with low temperatures causing both short-term and long-term damage.

When the ambient temperature drops below 16°C, the chemical activity of the battery decreases, leading to a temporary reduction in battery life. For example, a phone that normally lasts 6 hours may only last 4 hours in cold conditions. This is a normal phenomenon, and battery life will recover once the device returns to room temperature.

However, long-term use or storage of a used iPhone in low temperatures (below 0°C) can cause irreversible damage:

1.Low temperatures can cause the battery's internal electrolyte to solidify, hindering ion transport.

2.Frequent charging and discharging in such conditions may lead to permanent capacity loss and a rapid decline in battery health.

3.In severe cases, it can cause the battery to swell, potentially compromising the safety of the phone's hardware.

Winter Care Tips for Used iPhones:

1.Avoid prolonged outdoor use in freezing weather. If you need to go outside, keep your phone in your pocket to keep it warm.

2.Do not charge your phone in low temperatures. Allow it to return to room temperature first to prevent reduced charging efficiency and cell damage.

3.For long-term storage, maintain a battery level between 40%-60% and store the phone in a dry, room-temperature environment, avoiding low-temperature storage.