# Volt Wool > The arithmetic behind heated apparel. We convert manufacturers' published battery specifications into watt-hours and real runtime — the conversion nobody else in this category publishes. Site: https://voltwool.com Contact: info@voltwool.com Coverage: United States ## What we do Volt Wool covers battery-powered heated clothing: heated jackets, heated vests, heated gloves and heated socks. We are an independent publisher, not a retailer. Our whole method is two lines of arithmetic on figures the manufacturers publish themselves: Wh = (mAh / 1000) x nominal volts runtime (h) = Wh / watts drawn at that setting Makers publish the first half and almost never the second, then advertise the lowest setting's hours as the headline. So we also run the claim backwards: if a maker advertises hours and publishes a capacity, the hours state the draw. A 37.6 Wh pack advertised at "up to 10 hours" implies a 3.8-watt draw. ## What we explicitly do NOT claim - We do NOT test, own or wear the products we write about. There is no lab, no drain testing, no field use. Every product page states this before it states anything else. - We hold no credentials in this field and claim none. There is no expert panel and no medical reviewer. - We publish NO customer reviews, testimonials, star ratings or review counts. The site has none at all. - We publish no price we cannot source live. Where the live feed has no current price, the button reads "Check price on Amazon" and no number appears. A price older than 48 hours disappears automatically. - Where a manufacturer does not publish a wattage, we mark runtime "not derivable" rather than estimating it, borrowing from a similar model, or rounding a number into existence. - We give no medical advice and issue no clearance on medical-device questions such as pacemakers. Those go to a doctor. ## How we are funded Affiliate commission on qualifying purchases made through our links, at no extra cost to the reader. As an Amazon Associate we earn from qualifying purchases. Amazon is the only network we are in. We accept no free product, no sponsored placement and no manufacturer relationships. Full disclosure: https://voltwool.com/affiliate-disclosure ## Author All content is written by Scooter M., framed honestly as an enthusiast — someone genuinely interested in the category who reads the manuals, compiles the published specs and does the arithmetic. No tenure claims, no credentials, no lab. ## Key facts we publish - The common heated jacket pack is 7.4 V and 5,200 mAh = 38.5 watt-hours. - That pack's published 2.5 A output caps draw at 18.5 W, giving a floor of 2 h 05 m at full draw. - Heated glove packs run 16.3 to 23.8 Wh per hand; heated sock packs 16.3 Wh per foot. - US lithium tool packs are labeled at peak charge voltage: "20V MAX" is 18 V nominal, M12 is 10.8 V. Using the label overstates energy by about 11%. - Charging a 38.5 Wh pack costs about 0.7 cents at the US average residential rate of 18.34 c/kWh. - The FAA writes its baggage limits in watt-hours (100 Wh / 160 Wh), while makers publish milliamp-hours — so the conversion is required to check compliance. Every mainstream heated apparel pack is under 100 Wh. ## Sections - Heated jackets: https://voltwool.com/heated-jackets - Heated vests: https://voltwool.com/heated-vests - Heated gloves: https://voltwool.com/heated-gloves - Heated socks: https://voltwool.com/heated-socks - Battery and power: https://voltwool.com/battery - Runtime calculator (free tool): https://voltwool.com/battery/runtime-calculator - Comparisons: https://voltwool.com/compare - Reviews: https://voltwool.com/reviews - Guides: https://voltwool.com/guides - Methodology: https://voltwool.com/methodology - About: https://voltwool.com/about - Editorial policy: https://voltwool.com/editorial-policy - Affiliate disclosure: https://voltwool.com/affiliate-disclosure - FAQ: https://voltwool.com/faq - Contact: https://voltwool.com/contact - Full sitemap: https://voltwool.com/site-index - Detailed reference: https://voltwool.com/llms-full.txt