Different categories of photobatteries: leftphoto-enhanced batteries, where the batteries are illuminated during constant current charge and/or discharge, resulting in higher capacities being recorded. Although the cell is usually illuminated during the entire charge/discharge process, this protocol is not always appropriate, as will be discussed later. Centerphoto-assisted batteries, where the device cannot be solely charged by light, but the voltage required for charging can be reduced by light. Rightphoto-rechargeable batteries, where the entire charging process is driven by light. The green dashed lines and solid arrows indicate the voltage savings from the dark condition.
