45mm PVC Heat Shrink Tubing Battery Sleeve Wrap — 7 Colors, 1–50 Meter

Measure the total length of the area you need to cover, then add 10–15% extra for overlap and trimming. For a single 18650 battery cell (typically about 65mm / 2.6" long), 1 meter is generally more than enough for multiple wraps. For larger battery packs or wiring harnesses, choose 5m, 10m, or longer rolls to avoid running short mid-project. When in doubt, sizing up saves a second order.

PVC heat shrink tubing typically has a 2:1 shrink ratio. This 45mm flat-width tube generally shrinks down to approximately 22–25mm in diameter after heat is applied. It is commonly used for 18650 cells (≈18mm diameter) and 21700 cells (≈21mm diameter). Always measure your specific cell or pack diameter and compare it to the shrunk diameter before ordering.

Once shrunk, PVC heat shrink tubing generally conforms tightly to the surface and resists light abrasion and incidental contact. It is suitable for battery packs used in RC vehicles, power tools, and e-bike builds where moderate vibration is present. For applications with extreme mechanical stress or repeated flexing, a thicker-wall or adhesive-lined tubing is typically a better choice.

PVC heat shrink tubing generally provides a degree of moisture resistance suitable for indoor and light-duty outdoor use — for example, protecting a battery pack stored in a garage or used in occasional rain exposure. For fully waterproof or submersion applications, a dual-wall adhesive-lined heat shrink is typically recommended, as it creates a sealed barrier that standard PVC tubing does not.

Yes. At 45mm flat width, this tubing is commonly used to rewrap 18650, 21700, and similarly sized cylindrical lithium cells, as well as small battery packs assembled from those cells. It is also used for AA/AAA battery holders and small cylindrical capacitors in that diameter range. Always verify the diameter of your specific cell or pack before ordering to ensure a snug fit after shrinking.

Color choice is generally functional or organizational. Black and transparent are the most common for battery rewrapping — black gives a clean, finished look, while transparent keeps original cell labels and capacity markings visible. Bright colors like red, yellow, blue, and green are useful for color-coding battery packs by voltage, capacity, or ownership in multi-pack setups. Fruit Green is a popular choice for visibility in tight enclosures.

Yes. The tubing ships as a continuous roll and can be cut to any length with scissors or a utility knife before applying heat. This makes it straightforward to customize coverage for cells of different heights, irregular pack shapes, or wire bundles of varying lengths. Cut first, position, then apply heat — do not attempt to cut after shrinking.