... . 6-8 hours with warmth d. self-owned brand Heat glovesFeature of heat gloves: materials choosing, safety & reliability, energy saving, easy usage. ... other similar products.4. Easy using: design for optional charging, USB or power adapter at home , li-batterysupply outdoor, easy to ... battery area, which is very convenient to take anywhere. USB cable is equipped with DC plug-in connection, which is ...