Match the garment to the source. A heated jacket that takes its own 7.4-volt battery needs that battery, a garment built for USB can run from a power bank, and a 12-volt vehicle garment needs a 12-volt supply. Read the label first, then size the battery in watt-hours against the garment's draw, keep the battery warm inside your clothing, and charge lithium packs only above freezing.
Start with the garment's label
Heated clothing does not share one power standard. Wikipedia's overview of the category describes three common systems: 12-volt garments, mainly for motorcycles, ATVs and snowmobiles, which draw from the vehicle battery; 7.4-volt garments, the most common type for jackets and gloves, which usually come with a rechargeable pack; and 5-volt garments that run from an ordinary power bank. The same page says the 12-volt systems heat a larger area at higher temperatures than the 7.4-volt ones.
| Garment type | Where the power comes from | What to check |
|---|---|---|
| Own battery pack (commonly 7.4 V) | The pack that came with it, or a replacement from the same maker | Pack connector and charger match; spare packs for long days |
| USB (5 V) | A power bank, a power station USB port or a wall adapter | Plug type and the bank's output rating against the garment's input rating |
| 12 V vehicle wiring | A vehicle battery, or a power station's 12-volt port if the manual allows it | The port's output limit; one garment is a small load, several may not be |
Do not adapt a connector to make a mismatch fit. If the garment wants a particular voltage, use the supply it was built for, and follow the garment manual if it lists compatible batteries or banks.
Power banks for USB garments
A USB bank is the simplest route for vests, gloves and socks that accept 5-volt power, and the same bank can still charge a phone. Look for a bank whose output rating covers the garment's input rating with room to spare, and read the bank's label for the output of each port, since ports often share a limit. A short, sturdy cable cuts snagging inside a jacket. Our solar power bank guide covers capacity, ports and pass-through charging, and the power bank versus power station comparison explains when a bank stops being enough.
Estimate runtime without guessing
Wikipedia gives a broad range for 7.4-volt garments, around 2 to 8 hours depending on heat setting and weather, and says many jackets and vests can run for nearly double that with a separately sold extended battery. Treat that as a ballpark, not a promise. For your own gear, take the garment's rated power in watts from its label or manual, and the battery's watt-hours from its label. Dividing one by the other gives rough hours on high, before cold losses. Most people run the garment on a lower setting after the first warm-up, which stretches the battery. Our watt-hour sizing guide walks through the arithmetic for larger batteries.
Keep the battery warm
Cold shrinks battery capacity. Battery University reports that a battery that delivers full capacity at 80 degrees F delivers only about half at 0 degrees F, and that the loss is temporary and recovers when the battery warms. It also notes that warming a nearly depleted battery in a pocket can win back some runtime. For clothing, that points to a practical habit: carry the bank in an inside pocket against your body, not in a cold outer pocket or the bike pannier, and run the cable inside the jacket.
Charging in the cold
Charging is touchier than discharging. Battery University says lithium-ion packs should not be charged at or below freezing, because metallic lithium can plate onto the anode and cause permanent loss of performance and safety. If your plan is a bank topped up by a folding panel at a cold camp or a duck blind, keep the bank in a warm pocket or bag and run only the panel cable outside. If it has been sitting in freezing air, warm it before you charge it. The self-heating battery guide covers batteries designed to manage this, and the power station cold weather guide covers the larger units.
A charging plan for a full day out
Gloves, socks and a jacket may each have their own battery. Charge them all indoors the night before, label the matching chargers and cables, and carry a spare pack or a bank if the day is long. A power station or bank at base camp can recharge packs between sessions, as long as it stays inside the warm part of the shelter. If you rely on solar to top up a bank during the day, expect little from short winter days, and the site survey guide shows how low the winter sun sits, so treat sun as a bonus rather than the plan.
Cables, fit and safety habits
Most failures with heated gear are mechanical. Gloves and socks sit at the far end of a cable that has to cross a sleeve or boot, so use the lead the maker supplies and route it under layers where it cannot catch on a zipper or strap. A right-angle plug or a short cable helps when the bank rides in a chest pocket. If a garment has a dedicated battery pocket, use it, since the pack is sized and secured for that spot. Keep connectors dry, and let wet gloves and socks dry fully before you plug anything in. Skip extension cords and loose adapters that add resistance and another point of failure.
- Follow the garment manual for washing, folding and the heat settings it allows.
- Do not use damaged batteries or cables. Swollen packs, cracked cases or frayed leads should be retired, not taped.
- Do not rely on heated gear alone in dangerous cold. Keep insulating layers on, and carry a spare battery.
- Do not charge unattended on a bed or couch, and use the charger the maker supplies or approves.
- Check the vehicle's capacity before connecting several 12-volt garments, since Wikipedia notes the battery may not handle the load.
Bottom line: Read the garment's voltage and connector first, and use the supply it was made for. A USB bank suits 5-volt gear, a 7.4-volt garment wants its own pack, and a 12-volt garment wants a 12-volt source. Keep batteries warm in an inside pocket and do not charge lithium below freezing.
Frequently Asked Questions
Can I power a heated jacket from a power bank?
Only if the jacket is built for USB power. Check the garment label for its input rating and the bank label for its output rating. A jacket that uses its own 7.4-volt pack needs that pack.
How long will a heated jacket run?
Wikipedia gives around 2 to 8 hours for 7.4-volt garments depending on heat setting and conditions. Your own runtime depends on the garment watts, the battery watt-hours and the cold.
Why does my battery die faster in the cold?
Battery University says cold lowers available capacity, about half at 0 degrees F for a battery that gives full capacity at 80 degrees F. The loss recovers when the battery warms.
Can I charge a power bank outside in freezing weather?
Avoid it. Battery University says lithium-ion should not be charged at or below freezing. Keep the bank warm and run only the panel cable outside.
Can a power station run heated clothing?
Often yes through a USB or 12-volt port, if the port output covers the garment draw. Check the station manual and the garment label, and do not adapt a mismatched connector.
Sources and verification
The voltage and runtime points below come from the sources listed. Your garment manual and battery label set the voltage, connector and charging rules for your gear.
- Wikipedia, Heated clothing (secondary source): 12-volt, 7.4-volt and 5-volt power systems, the 2 to 8 hour runtime range for 7.4-volt garments, and the caution about connecting several garments to a vehicle battery.
- Battery University, BU-502: capacity loss in the cold, recovery on warming, and warming a depleted battery in a pocket.
- Battery University, BU-410: no lithium-ion charging at freezing temperatures and lithium plating.
We did not find a primary maker page that lists safe power banks for heated clothing, so that choice is left to your garment manual. Wikipedia is a secondary source; confirm figures against your garment maker.