Rechargeable battery

A rechargeable battery system, comprising:

• a battery that includes:
• a housing, wherein at least one of internal surfaces of the housing is at least partially coated with an indium tin oxide and the housing has a first side and a second side opposite to the first side, the first side including a first electrode and the second side including a second electrode, wherein the housing further includes first walls and second walls, wherein the first walls define first holes effective to enable light from a light source to be exposed to the first electrode and the second walls define second holes effective to enable air to flow into and out of the housing;
• the first electrode, wherein the first electrode includes a TaVB2 component and wherein the first electrode is effective to react with oxygen in the air in the housing to produce at least one electron;
• an insulator between the first electrode and a second electrode;
• a sensor disposed so as to be effective to detect a reaction of the TaVB2 component and oxygen in the housing, the sensor effective to generate a reaction signal in response to the reaction;
• and
• a processor in communication with the sensor, wherein the processor is effective to receive the reaction signal and generate an indication based on the reaction signal.

A rechargeable battery system, comprising:

• a light source configured to provide light to a battery that includes a housing, wherein at least one of internal surfaces of the housing is at least partially coated with an indium tin oxide and the housing has a first side and a second side opposite to the first side, wherein the first side includes a first electrode and the second side includes a second electrode, wherein the housing further includes first walls and second walls, wherein the first walls define first holes effective to enable the light from a light source to be exposed to the first electrode and the second walls define second holes effective to enable air to flow into and out of the housing, wherein the first electrode includes a tantalum vanadium boron component and wherein the first electrode is effective to react with oxygen in the air in the housing to produce at least one electron;
• a sensor disposed so as to be effective to detect a reaction of the tantalum vanadium boron component and oxygen in the housing, the sensor effective to generate a reaction signal in response to the reaction;
• and
• a processor in communication with the sensor, wherein the processor is effective to receive the reaction signal and generate an indication based on the reaction signal, wherein the indication indicates whether a charge of the battery is below a threshold.