Easy to use: Simply slide the charging cover over and connect the charging cable. Long lasting heat: Designed to retain its heat for up to six hours! Rapid: Takes around 8-12 minutes to reach a temperature of 70-75°C. Perfect for: Heating the bed, warming up hands, or using as a heat pad on aches and pains. Hot water bottle: Get a rechargeable hot water bottle! Permanently sealed: Designed so no water can escape. Rechargeable Hot Water Bottle | Living Social