【Rechargeable Hot Water Bottle - Explosion-Proof Function】 This rechargeable hot water bottle features an explosion-proof plug for charging the main unit, eliminating the need to replace hot water, making it convenient to use. It automatically turns off when it reaches 65°C. The hot water bottle can be charged and reused, providing continuous warmth. It's an essential cold-weather item. For those who dislike dry heating, try holding the hot water bottle against your stomach during the day. It's especially effective for women who experience coldness in their abdomen or lower back, and for those suffering from menstruation or PMS. 【7-15 Minutes Charging & Over 8 Hours of Heat Retention】 The hot water bottle charges in just 7-15 minutes and can be used for over 8 hours. It can retain heat for about 6-10 hours inside a futon and about 4 hours when used against the abdomen or lower back. Place the hot water bottle in your futon about 30 minutes before bed to warm it up. Placing the hot water bottle near your feet or beside your abdomen while sleeping will warm your feet and promote restful sleep. (The specific heat retention time may vary depending on the usage environment.) 【Skin-Friendly Material】 The rechargeable hot water bottle is a new type of hot water bottle made with a soft, skin-friendly fabric for the insulation cover and the main unit, providing excellent insulation and heat retention. Unlike other hot water bottles, which can feel cold to the touch in winter when not warm, our hot water bottle is designed to prevent low-temperature burns, allowing you to use the main unit without a cover. It doesn't feel cold to the touch and has a soft, comfortable feel. The hot water bottle's insulation cover is removable and washable, ensuring it's always clean. 【8-Layer Structure & PSE Certified】 Hot Water Bottle Main Unit Energy-Saving Rechargeable Hot Water Bottle, 8H Long-Lasting Heat Retention, Hot Water Bottle, Heat Storage Type, Protective Cover Included, Cordless, Hot Pack, Warm Goods, Insulated Cover Included, Washable, Reusable, Overheat Protection, Explosion-Proof Function, Automatic Power Off, PSE Certified, Suitable for Abdomen/Back/Fingertips/Feet, Warm Goods, Cold Weather Protection, Ideal for Menstrual Periods, Winter Cold Protection, Cold Relief, Gift, Gray 184 $$1999