Wow. 3000mAh battery. Up to 6 hours operating time. Quality design and materials.
This device is a nice upgrade for anf abdominal/lower back/menstrual heating pad. It contains graphene technology for quick and uniform heating (heating and infrared therapy), offering three temperature settings (104ªF - 140ºF). The three temperature settings are indicated by corresponding color lights: Green = Low Setting, Blue = Medium Setting and Red = High Setting.  These indicators are found on the battery, which is an integral accessory for the heating pad. It controls the power on/off and access to the three temperature settings.<br />The battery bank has one button, a series of indicator lights and a port for the pad’s plug. The battery is the only means to powering and controlling the warming pad.  So, don't lose it, and you can't replace the power bank with a spare USB power bank. Operation is simple, easy. Theres a power button that cycles through the three temperature settings. As mentioned earlier, the single temperature indicator will change colors respective to the heat level.<br />Also displayed on the battery bank is the battery status indicator lights: Flashing (0 - 10%), Low (10 - 35%), Mid (35 - 70%), High (70 - 100%). These setting are indicated via the three blue lights (0/blinking lights, and 1 - 3 steady lights for the four instances).<br />The use of graphene allows for a relatively thin heating pad. This enables a lightweight device, that is conforming to the body’s curves. It fits comfortably, with excellent, consistent contact.<br />These are all noteworthy features. However, the highlight component is the battery capacity. The battery capacity is rated at 3000mAh. Indeed, to my knowledge, it is the highest capacity battery for the product genre. This generous capacity provides up to 6 hours of operating time. According to the manual, it takes 3 - 4 hours to fully charge a depleted battery.<br />At the current cost of $28, it seems very reasonably priced, especially considering the battery specs. Factoring in the various features and quality of design, materials and construction, it’s a very good value.<br />The significant other gives this device a strong favorable nod. Thus, based on these initial impressions, it earns a well deserved 4.5+ star rating, with a high level recommendation.
Rating: 5 stars