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The Best Convert Top Post To Side Post Battery of 2023 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best Convert Top Post To Side Post Battery of 2023. Check our ranking below.

2,391 Reviews Scanned

Rank No. #1

Ampper 3/8"-16 Thread Female Lead Top Post to Side Post Terminal Adapters, Standard Top Post to Standard 3/8" Side Post Terminals (+/-) W/Cover (1 Pair)

1 Pair / 2 Pcs female LEAD battery terminal adapters with covers, used for standard top post convert and extend to standard 3/8" side post battery terminal.
For standard top post battery (convert from): 19 mm cone/tapering positive (+) & 17 mm cone/tapering negative (-).
Extended to standard side post terminal (convert to): both adapters are SAE 3/8"-16 thread female.
Sturdiness terminal post adapter for increased strength, conductive and reduced corrosion.
Easy to install: direct fit and no modifications, make it faster and easier for installation.

Rank No. #2

Top Post to Side Post Battery Adapter, Universal U1 Flag/Side Post to SAE Top Post Converter Kit, Compatible with Cars, Trucks, SUVs, Boats, 2 Pack

Converts U1/Flag/Side to Top Post: Securely converts U1 flag terminals, side post terminals, or L-type connections to standard SAE top posts. This versatile side post to top post battery adapter ensures compatibility with cars, trucks, SUVs, boats, generators, and lawn equipment. Polarity-free design for simple installation
Heavy-Duty Lead Construction: Made from high-density lead for maximum electrical conductivity and corrosion resistance. Provides superior weight and stability versus lighter alloys, preventing loosening from vibrations – essential for car battery post adapters and generator use. Includes stainless steel hardware
True Side Post Compatibility Note: While perfect for U1 flag terminals (common side-mount batteries), this adapter does not fit GM-style cylindrical side posts. Ideal when needing a battery side post adapter for L-terminal batteries or converting to top posts on marine/RV equipment
Tool-Free, One-Second Installation: Allowing one-handed, tool-free snap-on installation. Just align and click onto your U1 terminal! Eliminates frustration – far easier than traditional battery stud to post adapters
Value 2-Pack: Includes 2 adapters (sufficient for one battery). Compact size (1.3” x 1.3” x 0.8”) fits tight battery compartments

Rank No. #3

ACDelco Professional 4BA17 Positive and Negative Battery Top Post to Side Terminal Adapters

Designed to deliver trouble-free, consistent performance
Right for your vehicle and lifestyle
Made from high-quality materials for ultimate durability
Manufactured to meet or exceed strict quality requirements
If you have any questions or need fitment information for your vehicle, please contact with us

Rank No. #4

Convert Side Terminal Batteries to Top Posts, One Pair Brass Battery Side Terminal Charging Posts for 8mm Positive and Negative Battery Cable Terminals

[HEX NUT]: Each post comes with a hex nut that can be tightened with a wrench.
[CONVERT SIDE TERMINAL BATTERIES]: Convert side terminal batteries to top posts for easy charging.
[CLEAR BOTTOM COMMENT]: Positive (+) and Negative (-) markings at the bottom of each post for easy identification.
[ACCURATE THREAD SIZE]: 8mm thread diameter and 10mm length to ensure compatibility with battery cables.
[VERSATILE APPLICATION]: Suitable for car batteries, these poles can also convert side post batteries into top post batteries.

Rank No. #5

Generic Top Post to Side Post Terminal Adapter- Female Thread - Lead - Positive and Negative (1 Pair)

Converts a Top Post battery to accept Side Terminal Connections
Also can be used to Convert Top Post to accept Ring Terminal Connections.
Easy to Install

Last update on 2025-07-06 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

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FAQ:

Q: What is a battery side post?

A: A side post battery has the positive and negative terminals located on the side of the battery rather than on the top of the battery. Generally, car batteries need to be replaced every 3 to 5 years as they are being used every time you run the car as car battery supplies the power necessary to start your car.

Q: What battery post is positive?

A: Marine batteries typically have two posts, a 3/8″-16 threaded post for the positive terminal, and a 5/16″-18 threaded post for the negative terminal. Zinc battery terminals are an environmentally friendly alternative to lead battery terminals.

Q: What is negative battery post?

A: The reason it’s only the negative post is that the battery is being under-charged and left that way. Sulfation occurs on the negative post in this condition. If corrosion was on the positive post, that would indicate a consistent over-charge condition.

Q: What’s’ a side post battery?

A: General Motors, and other automobile manufacturers, have also begun using side-post battery terminals, which consist of two recessed female 3/8″ threads (SAE 3/8-16) into which bolts or various battery terminal adapters are to be attached. These side posts are of the same size and do not prevent incorrect polarity connections.

Convert Top Post To Side Post Battery