"3C" isn’t a standard household battery size. Most devices that look similar use size C (C‑cell) batteries, which are commonly 1.5 volts when they’re single‑use alkaline. The term "3C" can show up in other ways, though:

• Quantity shorthand: a pack or device may say “3 x C,” meaning it uses three C batteries.
• Model codes: some rechargeable battery packs include "3C" as part of a product or series name.

To be sure what you need, check your device’s battery compartment or manual for the exact size and type. On Walmart.com, you can filter for size C and review the product details to confirm voltage, pack count, and whether it’s disposable or a dedicated rechargeable pack.

When you see "C3," it usually doesn’t indicate a special battery size. It most often means one of the following:

• Pack or device quantity: “C x 3” or “C3” can be shorthand for three C batteries needed or included.
• Model naming: some rechargeable battery packs use codes that include “3C,” which are specific to a device.

Here’s how to interpret it:

1. Check the product description for pack count and battery size (look for “C” or “C‑cell”).
2. If it’s a replacement battery pack, match the full model code your device lists.

When in doubt, review your device manual or battery compartment markings. On Walmart.com, product pages list size and count, which can help you get exactly what your device calls for.

Try these quick checks to confirm a C‑size battery:

• Printed label: Look for “C” or “C‑cell” printed on the battery wrapper. Many disposable C batteries also note 1.5V on the label.
• Device markings: Inside the battery compartment or in the user manual, the required size is typically stated as “C.”
• Compare visuals: On Walmart.com, the product photos and descriptions indicate size; you can compare your battery to those images.

If the battery doesn’t show a clear size, bring the device or battery to the store for assistance. Avoid mixing different sizes or types in the same device, as that can affect performance. When shopping online, filter for size C to narrow your options.

C batteries are cylindrical household cells with a raised positive terminal on one end and a flat negative base on the other. You’ll typically see the size marked on the wrapper as “C” or “C‑cell,” and disposable versions commonly list 1.5 volts.

• Packaging: Often sold in multi‑packs for home devices.
• Markings: Polarity (+/–) icons help you align them correctly in your device.
• Use cases: Frequently found in medium‑drain household items, such as certain décor or gadgets.

When you shop on Walmart.com, product photos and descriptions call out the size clearly. If your device is particular about battery type, double‑check its manual before you buy.

It depends on how you use your device:

• Alkaline C (1.5V): A practical pick for items used occasionally or for devices that sit idle for long periods. You can buy them in multi‑packs to keep extras on hand.
• Rechargeable options: Helpful for devices used frequently, as they can be recharged and reused. Some products rely on a dedicated rechargeable battery pack; in that case, match the exact model your device specifies.

Tips: Don’t mix old and new batteries or different types in the same device. Check your manual for compatibility. On Walmart.com, filter by size C, review pack count, and choose pickup or delivery if available in your area.