Q:

Are there battery-operated heaters?

A:

The small battery-operated heaters for hands used by hunters, fishermen and sports enthusiasts are quite efficient. The heater is turned on and tucked into a pocket, keeping the owner's hands warm for 5 to 6 hours, depending on the model. Heated socks are also available.

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Full Answer

Battery-operated hand warmers often use rechargeable batteries. Some models have USB ports, which allow charging from a computer or 12-volt power outlet in a vehicle.

Other types of battery-operated heaters, such as defrosters and car heaters, may be plugged into a vehicle's power outlets or a cigarette lighter. These are designed for use when the vehicle is running, so the battery is not drained.

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