Battery Adaptor Sleeves 2 Pair - Universal Car Battery Terminal Shims

In this review the reviewer tested the 2 Pair Battery Adaptor Sleeves to see if they solve loose or worn battery posts on cars, trucks, boats and RVs. The bottom line: these soft metal lead alloy battery terminal adapter shims are a simple, low-cost fix that restores a tight, conductive connection when posts are undersized or slightly damaged. Installation is manual and may require tweezers to seat the sleeve on the post, but once positioned the sleeves restore good contact and help avoid intermittent electrical issues.

Key Features

• Quality Material: Made from a soft lead alloy that resists rust and corrosion while remaining flexible enough to conform to worn posts for reliable contact.
• Wide Application: Designed for both positive and negative top post connections, the sleeves work with cars, RVs, trucks, boats and other vehicles to extend battery life.
• Easy To Use: The soft alloy allows bending and adjustment with tweezers so the sleeve fits over the battery post and under the clamp for a secure connection.
• Practical Function: Can convert a positive post to a negative post as needed and fills gaps on undersized or slightly damaged battery terminals to restore conductivity.
• Pack Quantity: Supplied as 2 pair of shims so there is enough material for multiple repairs or for both battery posts on a single battery.

Who It's For

This product is best for DIYers, mechanics and boat or RV owners who need a quick repair for worn or undersized top post battery terminals and want to avoid immediate terminal replacement. It is also useful for anyone who needs to adapt a post polarity in a pinch.

It is not aimed at users who prefer permanent soldered or welded terminal repairs, or those with severely corroded posts that require full terminal replacement; in those cases a full new terminal or professional service is a better choice.

Pros & Cons

Pros

• Restores a secure metal-to-metal connection on worn or undersized battery posts.
• Soft lead alloy offers good electrical conductivity and can be shaped to fit.
• Works for both positive and negative top post applications across vehicles and marine use.

Cons

• Because the material is soft, initial placement can require tweezers or careful handling for a snug fit.
• Not a permanent replacement for heavily damaged or corroded battery terminals; it is a repair aid rather than a full terminal swap.

Specifications

Brand	Icyhaws
Material	High quality soft lead alloy
Color	Silver
Quantity	2 Pair
Upper Diameter	0.59 in
Lower Diameter	0.66 in
Compatibility	Cars, RVs, trucks, boats, ships, yachts

Our Verdict

The 2 Pair Battery Adaptor Sleeves are a practical, cost-effective repair for loose or undersized top post battery terminals and make sense for DIY maintenance on cars, trucks and marine craft. They deliver good conductivity and flexibility, and the two-pair pack provides spare parts for multiple repairs; however, users with severely corroded posts should opt for a terminal replacement.

Frequently Asked Questions

Can these shims be used on both positive and negative posts?
Yes. The sleeves are designed for both positive and negative top post battery connections and can also be used to convert polarity when required.

How do I install them if the sleeve is tight?
Because the alloy is soft, use tweezers or small pliers to gently open and position the sleeve on the post, then seat the battery clamp over it for a secure fit.

Will they prevent corrosion?
The material is anti-rust and anti-corrosion to help maintain a reliable connection, but they do not replace corrosion treatment or long-term terminal maintenance.