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.Know More
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.Learn more in Outdoor Adventure
Water heaters vary significantly in terms of efficiency, although newer models tend to offer better efficiency that older models. Homeowners often have to choose between optimal efficiency and convenient design.Full Answer >
Eemax water heaters use direct heating elements to transfer heat directly to water without the use of a tank, resulting in 99 percent thermal energy efficiency. Because these systems heat water instantly and only when needed, there is no standby heat loss.Full Answer >
Oil-powered hot water heaters are less efficient than their gas-powered equivalents and, by some measures, electrical hot water heaters. However, the gap in efficiency between oil and gas can be small, and electrical heaters are typically more expensive to operate.Full Answer >
Nikon's "ATB" designation in its binocular line stands for "All Terrain Binocular." These binoculars are designated as such because they are waterproof, fog-proof and shockproof by design.Full Answer >