--- title: "battery post shims — Niche Verdict: Skip it (51/100) | Amazon United States - Flapen" canonical_url: "https://flapen.com/amazon/research/us/automotive/battery-post-shims" last_updated: "2026-07-10T02:28:55.988Z" locale: en meta: description: "a small market ($91K/yr) — battery post shims doesn't clear our bar today." "og:description": "a small market ($91K/yr) — battery post shims doesn't clear our bar today." "og:title": "battery post shims — Niche Verdict: Skip it (51/100) | Amazon United States - Flapen" --- Back to Flapen home # **battery post shims** **Skip it****51/100 ** a small market ($91K/yr) — battery post shims doesn't clear our bar today. **Market/yr** **$91K** **Growth (1y)** **+288.3%** **Products** **21** **Brands** **19** was 19 a year ago **Sellers** **25** **Price range** **$3.54–$9.95** **Returns** **3.3%** **Rating** **3.9★** **Skip it** Scored 51/100 across market size, growth, competition, quality gap, and returns. Market sizeGrowthCompetitionQuality gapReturns Market size **5** ×0.30 Growth **84** ×0.30 Competition **42** ×0.20 Quality gap **87** ×0.10 Returns **74** ×0.10 ## **Demand** Weekly Amazon search volume, last 104 weeks — +288.3% year over year. 3K2KSpike '24Spike '25Holiday '25Jul '24Nov '24Mar '25Jul '25Nov '25Mar '26 ## **Seasonality** Monthly demand index across the year — 1.00 is average. JFMAMJJASOND Peak months: Jan, Feb · busiest ÷ quietest = 1.6× ## **Competition** - BESULEN16% - eMagTech16% - smilfuy15% - QWORK10% - AQEENURA7% - Ampper7% - Other (13 brands)30% The top 5 products take 62% of clicks — established leaders, but buyers still shop beyond them. 19 brands and 25 sellers compete here. **Brands** **19 **—flat was 19 a year ago **Sellers** **25** **Top 5 brand share** **63%** #ProductBrandPriceRatingReviewsClick shareTrend 1 ![eMagTech 4pcs Car Battery Terminals Shims Clamps Posts Spacer Shims for in-car Audio Video Connectors Silver](https://m.media-amazon.com/images/I/31oXsfZ0TML.jpg) [**eMagTech 4pcs Car Battery Terminals Shims Clamps Posts Spacer Shims for in-car Audio Video Connectors Silver**](https://www.amazon.com/dp/B0F8HRG8KF) eMagTech$9.034.5★5716%▲rising 2 ![BESULEN 10PCS Car Battery Post Terminal Shims Auto Lead Terminal Shim Caps with 12 Piece Washers for Top Post Battery Post Ends Repair Universal for Vehicles SUV Truck RV Boat](https://m.media-amazon.com/images/I/41J0SU7CqXL.jpg) [**BESULEN 10PCS Car Battery Post Terminal Shims Auto Lead Terminal Shim Caps with 12 Piece Washers for Top Post Battery Post Ends Repair Universal for Vehicles SUV Truck RV Boat**](https://www.amazon.com/dp/B0CKYG11WQ) BESULEN$7.944.4★30515%▼falling 3 ![smilfuy 1 Pair Battery Post Shims Pure Lead Anode Cathode Sleeves](https://m.media-amazon.com/images/I/41MCHKkXGvL.jpg) [**smilfuy 1 Pair Battery Post Shims Pure Lead Anode Cathode Sleeves**](https://www.amazon.com/dp/B0D7VQPRJM) smilfuy$4.833.6★32415%▼falling 4 ![QWORK Battery Post Shims Cap 4 Pack Terminal Cable End for Positive or Negative Post](https://m.media-amazon.com/images/I/314QAee7R4L.jpg) [**QWORK Battery Post Shims Cap 4 Pack Terminal Cable End for Positive or Negative Post**](https://www.amazon.com/dp/B09P51G47F) QWORK$7.294.1★18810%▲rising 5 ![Universal 10PCS Car Battery Post Terminal Shims Kit with Washers - Silver Color Terminal End Repair Accessories](https://m.media-amazon.com/images/I/51BA+W5tTRL.jpg) [**Universal 10PCS Car Battery Post Terminal Shims Kit with Washers - Silver Color Terminal End Repair Accessories**](https://www.amazon.com/dp/B0DZ6JSHZH) AQEENURA$7.694.0★607%▲rising 6 ![2 Sets Battery Post Shim Set With 14 Washers - Lead Terminal Shim Caps for Car Battery Repair - Fits Top Post Battery Ends](https://m.media-amazon.com/images/I/41s0wH1hGoL.jpg) [**2 Sets Battery Post Shim Set With 14 Washers - Lead Terminal Shim Caps for Car Battery Repair - Fits Top Post Battery Ends**](https://www.amazon.com/dp/B0FX52JFPL) Quadafy$6.083.4★365%▲rising 7 ![Icyhaws 2 Pair Battery Adaptor Sleeves Car Battery Terminal Shim Universal Car Accessories Positive & Negative Post Battery Terminal Adapter Battery Terminal Adapter Positive Post Shim Lead](https://m.media-amazon.com/images/I/41++pOGcVZL.jpg) [**Icyhaws 2 Pair Battery Adaptor Sleeves Car Battery Terminal Shim Universal Car Accessories Positive & Negative Post Battery Terminal Adapter Battery Terminal Adapter Positive Post Shim Lead**](https://www.amazon.com/dp/B0DHCMJ695) Icyhaws$5.923.8★1225%▼falling 8 ![Ampper Battery Terminal Cleaning & Repair Kit Battery Terminal Cleaning Kit with 5 Shims 2 Brushes and 12 Piece Washers](https://m.media-amazon.com/images/I/51DqD0W-uwL.jpg) [**Ampper Battery Terminal Cleaning & Repair Kit Battery Terminal Cleaning Kit with 5 Shims 2 Brushes and 12 Piece Washers**](https://www.amazon.com/dp/B0C13MK3JQ) Ampper$9.784.5★724%▲rising 9 ![TNAIYH Car Battery Post Terminal Shims with Washers 4PCS Positive & Negative Auto Lead Terminal Converter Shim Caps Vehicle Pure Anode Cathode Sleeves Universal for SUV RV Truck](https://m.media-amazon.com/images/I/418Oyv08jZL.jpg) [**TNAIYH Car Battery Post Terminal Shims with Washers 4PCS Positive & Negative Auto Lead Terminal Converter Shim Caps Vehicle Pure Anode Cathode Sleeves Universal for SUV RV Truck**](https://www.amazon.com/dp/B0FX9WLKGN) TNAIYH$5.853.3★123%▲rising 10 ![10 Piece Battery Post Terminal Shims Ampper Lead Terminal Shim Caps with 12 Piece Washers for Top Post Battery Post Ends Repair](https://m.media-amazon.com/images/I/51ckXoJ-hAL.jpg) [**10 Piece Battery Post Terminal Shims Ampper Lead Terminal Shim Caps with 12 Piece Washers for Top Post Battery Post Ends Repair**](https://www.amazon.com/dp/B0BZ84ZFJJ) Ampper$9.954.2★2333%▼falling 11 ![4PCS Car Battery Terminal Shim Kit with 4PCS Washers Positive & Negative Car Battery Post Shims for Worn Batteries Post Repair Lead Cars Batteries Shim for Cars SUVs](https://m.media-amazon.com/images/I/41pKn+I1ssL.jpg) [**4PCS Car Battery Terminal Shim Kit with 4PCS Washers Positive & Negative Car Battery Post Shims for Worn Batteries Post Repair Lead Cars Batteries Shim for Cars SUVs**](https://www.amazon.com/dp/B0GLQ9D816) EWOJUYE$5.364.4★112%▲rising 12 ![2 Pcs Battery Post Shims Car Battery Terminal Shims Extender Adapter Sleeve Automotive Pure Lead Anode Cathode Cap Spacer for Positive Negative Connection](https://m.media-amazon.com/images/I/318CHnmkI9L.jpg) [**2 Pcs Battery Post Shims Car Battery Terminal Shims Extender Adapter Sleeve Automotive Pure Lead Anode Cathode Cap Spacer for Positive Negative Connection**](https://www.amazon.com/dp/B0FR47T2G2) SISABAMA$4.153.6★302%▼falling 13 ![DUSCOKE Car Battery Post Shims Pure Lead Anode Cathode Terminal Converter Adaptor Positive & Negative Battery Terminal Post Sleeves Universal Car Accessories for Most Vehicles (2PCS)](https://m.media-amazon.com/images/I/31fSQSZTqBL.jpg) [**DUSCOKE Car Battery Post Shims Pure Lead Anode Cathode Terminal Converter Adaptor Positive & Negative Battery Terminal Post Sleeves Universal Car Accessories for Most Vehicles (2PCS)**](https://www.amazon.com/dp/B0F2HVN7DX) DUSCOKE$3.672.9★302%—flat 14 ![2PCS Battery Terminal Shim Soft Lead Battery Post Shims Caps with Adjustable Opening Car Batteries Terminal Post Shims Caps for Positive & Negative Connection Car Accessories](https://m.media-amazon.com/images/I/41cvupEpp9L.jpg) [**2PCS Battery Terminal Shim Soft Lead Battery Post Shims Caps with Adjustable Opening Car Batteries Terminal Post Shims Caps for Positive & Negative Connection Car Accessories**](https://www.amazon.com/dp/B0F9K5Z8LV) YGDMD$4.623.6★252%▲rising 15 ![10 Pieces Battery Post Terminal Shims Lead Terminal Shim Caps with 10 Pieces Washers for Top Post Battery Post Ends Repair Universal for Vehicles SUV Truck RV Boat](https://m.media-amazon.com/images/I/41za6NrY4bL.jpg) [**10 Pieces Battery Post Terminal Shims Lead Terminal Shim Caps with 10 Pieces Washers for Top Post Battery Post Ends Repair Universal for Vehicles SUV Truck RV Boat**](https://www.amazon.com/dp/B0CX4PMRVH) KOPKIO$8.834.4★1312%▼falling **~~Showing 15 of 21 — show all ~~** ## **Product shelf** All 21 tracked products in this niche. Top sellersNewestTrending [![eMagTech 4pcs Car Battery Terminals Shims Clamps Posts Spacer Shims for in-car Audio Video Connectors Silver](https://m.media-amazon.com/images/I/31oXsfZ0TML.jpg)**eMagTech 4pcs Car Battery Terminals Shims Clamps Posts Spacer Shims for in-car Audio Video Connectors Silver** eMagTech**$9.03**4.5★57 reviews](https://www.amazon.com/dp/B0F8HRG8KF) [![BESULEN 10PCS Car Battery Post Terminal Shims Auto Lead Terminal Shim Caps with 12 Piece Washers for Top Post Battery Post Ends Repair Universal for Vehicles SUV Truck RV Boat](https://m.media-amazon.com/images/I/41J0SU7CqXL.jpg)**BESULEN 10PCS Car Battery Post Terminal Shims Auto Lead Terminal Shim Caps with 12 Piece Washers for Top Post Battery Post Ends Repair Universal for Vehicles SUV Truck RV Boat** BESULEN**$7.94**4.4★305 reviews](https://www.amazon.com/dp/B0CKYG11WQ) [![smilfuy 1 Pair Battery Post Shims Pure Lead Anode Cathode Sleeves](https://m.media-amazon.com/images/I/41MCHKkXGvL.jpg)**smilfuy 1 Pair Battery Post Shims Pure Lead Anode Cathode Sleeves** smilfuy**$4.83**3.6★324 reviews](https://www.amazon.com/dp/B0D7VQPRJM) [![QWORK Battery Post Shims Cap 4 Pack Terminal Cable End for Positive or Negative Post](https://m.media-amazon.com/images/I/314QAee7R4L.jpg)**QWORK Battery Post Shims Cap 4 Pack Terminal Cable End for Positive or Negative Post** QWORK**$7.29**4.1★188 reviews](https://www.amazon.com/dp/B09P51G47F) [![Universal 10PCS Car Battery Post Terminal Shims Kit with Washers - Silver Color Terminal End Repair Accessories](https://m.media-amazon.com/images/I/51BA+W5tTRL.jpg)**Universal 10PCS Car Battery Post Terminal Shims Kit with Washers - Silver Color Terminal End Repair Accessories** AQEENURA**$7.69**4.0★60 reviews](https://www.amazon.com/dp/B0DZ6JSHZH) [![2 Sets Battery Post Shim Set With 14 Washers - Lead Terminal Shim Caps for Car Battery Repair - Fits Top Post Battery Ends](https://m.media-amazon.com/images/I/41s0wH1hGoL.jpg)**2 Sets Battery Post Shim Set With 14 Washers - Lead Terminal Shim Caps for Car Battery Repair - Fits Top Post Battery Ends** Quadafy**$6.08**3.4★36 reviews](https://www.amazon.com/dp/B0FX52JFPL) [![Icyhaws 2 Pair Battery Adaptor Sleeves Car Battery Terminal Shim Universal Car Accessories Positive & Negative Post Battery Terminal Adapter Battery Terminal Adapter Positive Post Shim Lead](https://m.media-amazon.com/images/I/41++pOGcVZL.jpg)**Icyhaws 2 Pair Battery Adaptor Sleeves Car Battery Terminal Shim Universal Car Accessories Positive & Negative Post Battery Terminal Adapter Battery Terminal Adapter Positive Post Shim Lead** Icyhaws**$5.92**3.8★122 reviews](https://www.amazon.com/dp/B0DHCMJ695) [![Ampper Battery Terminal Cleaning & Repair Kit Battery Terminal Cleaning Kit with 5 Shims 2 Brushes and 12 Piece Washers](https://m.media-amazon.com/images/I/51DqD0W-uwL.jpg)**Ampper Battery Terminal Cleaning & Repair Kit Battery Terminal Cleaning Kit with 5 Shims 2 Brushes and 12 Piece Washers** Ampper**$9.78**4.5★72 reviews](https://www.amazon.com/dp/B0C13MK3JQ) ## **Reviews** What buyers praise and complain about, mined from review topics. ### **What buyers love ** **Quality-Overall**15% *“The quality of the soft lead construction is excellent”* **Value For Money**10% *“Good price”* **Battery Life**9% *“I can give your battery extra life”* **Size-Overall**9% *“Fit ok”* **Advertised Vs Actual Product**8% *“As advertised”* **Efficiency**7% *“it works great”* **Ease Of Use**6% *“Fairly easy”* **Assembly/Installation**3% *“Easy install”* **Connectivity-Overall**3% *“maximum-contact connection”* **Rusts/Corrodes**3% *“It's always good to have this since it prevents corrosion”* ### **What buyers complain about ** **Size-Overall**36% *“Does not fit”* **Thickness**23% *“Would have been better if it were thinner”* **Connectivity-Overall**3% *“You cannot connect once the covers are on the post”* **Durability**3% *“would break if I tried too”* **Functionality-Overall**3% *“Didn't work for me”* **Quality-Overall**3% *“Cheap”* **Ease Of Use**2% *“Could not use at all”* **Natural Resource Wastage**2% *“WASTE OF TIME AND MONEY”* **Grip**1% *“Needs better grip surface”* **Value For Money**1% *“Waste of money”* #### **Top return reasons**- Size-Overall65% - Advertised Vs Actual Product8% - Thickness4% - Compatibility-Overall4% - Functionality-Overall4% - Defective Material/Parts4% - Quality-Overall2% - Value For Money2% - Material Quality1% - Assembly/Installation1%