A Complete Guide to C Batteries

C batteries are a widely used size of ‘dry cell’ battery. As the name suggests, dry cells were created to operate with minimal internal moisture, making these batteries ideal for portable devices. AA and AAA batteries are the most familiar size of dry cell battery, but these are smaller and therefore have a more limited lifespan than size C batteries.

C batteries are also known as R14s, after their designation by the International Electrotechnical Commission (IEC), a prominent electrical standards body.

C batteries, like other types of battery, are differentiated not only by their capacity and voltage but also by the key materials used in their construction.

Let’s take a look at C batteries by chemical type:

Alkaline C batteries are based around an alkaline electrolyte (anti-acidic electrically-conducting blend) of potassium hydroxide. Thanks to their energy density and long shelf life, C alkaline batteries are one of the most widely used types of batteries and they are commonly found in a variety of everyday household items.

As the name suggests, lithium C batteries make use of the metallic element lithium as the central anode (central conductor). They are noted for their long lives, but they are distinct from the rechargeable lithium-ion C batteries typically included in portable electronic devices such as smartphones and laptops. The latter derive their charge from the movement of lithium ions.

Standard C batteries are ideal for portable devices which consume mid-high levels of power. They are widely used in:

• Torches
• Cameras
• Radios
• Intruder alarms
• Musical instruments
• Walkie-talkies
• Toys

Can You Charge Non-Rechargeable Batteries?

No. Non-rechargeable batteries are simply not designed to be charged and attempting to do so could lead to ruptures, overheating and even explosions. Standard batteries cannot store excess electrons because they have no means to do so; once all the electrons stored within them have been depleted, the battery becomes inert. By contrast, rechargeable batteries do contain chemicals which can store excess electrons and these reservoirs are filled during the charging process.

Can You Recycle C Batteries?

Yes. C batteries can be recycled alongside other standard battery sizes. In some areas, local authorities accept batteries in standard refuse collection services. In others, you will need to take the used batteries to a local recycling centre or collection point to ensure proper disposal. Old batteries are broken down into the constituent components for reuse.

Are C Batteries Allowed on Planes?

In most cases, yes, but only smaller, portable models and only in carry-on luggage. Any batteries stored in checked-in bags pose a significant safety risk because they can catch fire or explode when exposed to the pressurised hold of commercial aeroplanes. Battery regulations can be complex, so it’s always advisable to check with the airline before flying.

How Long Do C Batteries Last?

There is no single answer to this question. A C battery’s lifespan depends on the specific model and size, as well as the power consumption of the device it is attached to. On average, a standard 1.5v C battery should last more than 18 hours when discharged at a rate of 200mA (milliamps). Milliamps are 1.000th of an amp, the basic unit of electrical current.

Rechargeable size C batteries typically have a capacity of between 2200 and 4500 mAh (milliamp hours). The latter is sufficient to power a strong torch for more than six hours.