How to Choose Pickup Truck Batteries
It’s easy to take the stuff that keeps our trucks running for granted. Like its battery. We hop in, turn the key, the engine starts and we’re off until there’s a click or dead silence when the key is turned.
Buy a Battery with the Correct Dimensions for Your Truck
Batteries come in all shapes and sizes. If you buy one that’s too small, it can move around in the battery tray, and the battery hold-down will undoubtedly be loose. If you buy a battery that’s too large, it may sit on the edge of the tray, which can rub a hole in the battery (and the hold-down probably won’t fit). If the battery is too tall, it could come into contact with the hood or some other piece of metal — and lead to a loud (and messy) explosion.
Make Sure the Battery Terminals Are in the Proper Configuration for Your Truck
There are numerous battery configurations. If you choose a set-up that differs from your truck’s original battery, the cables might not be long enough to reach the terminals. You might coax it on, but vibrations during driving, combined with the cable pulling on the battery post, will eventually break the post loose from the battery case. Never stretch a cable.
Each manufacturer determines battery requirements based on a truck’s power needs, such as installed accessories, starter demand, charging system and engine size. The manufacturer’s rating is the minimum battery rating that you should consider.
- Cold cranking amps (CCA) — what the battery is capable of producing on that cold morning when you go out and hit the key expecting something to happen. Cold start-ups are among the most difficult challenges for a battery, and if you buy a replacement with a lower rating than your truck requires, you may be stranded (buying a battery with a higher rating won’t hurt, but there’s no real advantage to a large increase).
- Batteries are marked with numbers that disclose dimensions and post location, such as group 24, group 24F, group 56, etc. If you see that type of designation on your original battery, write it down and give it to the person who’s helping you find a replacement (the parts department should have a reference guide if you can’t find the number either on your old battery or in your owner’s manual).
Batteries with acid must be vented, because they work using a chemical reaction that produces heat, vapor and expansion — if they are not vented, they explode.
- Older style auto batteries had individual caps with vent holes.
- Later batteries had two longer caps, each designed with individual caps to cover three battery holes, and a dual-stage venting system that allowed vapor to exit.
- Drivers sometimes think that today’s maintenance free batteries are sealed because they are made with caps that can’t be removed. They do vent but are designed so that much of the moisture in the vapors become trapped and goes back into the cells.
Changing the Battery Yourself
Conventional batteries are filled with a mix of acid and water. Take these precautions:
- If you get the liquid on your skin, wash it off immediately with soap and water.
- If you get it in your eyes, flush your eyes with water and head to the doctor’s office.
- If you get the fluid on your clothing, try rinsing it out right away, but don’t be surprised if the spot deteriorates and the hole becomes larger each time your shirt or pants are laundered.
Always Disconnect the Negative Battery Cable First and Reconnect It Last
If you loosen the positive cable clamp while the negative cable is still connected, and your wrench touches something metal on the truck, it will spark, resulting in burns, damage to tools or even a battery explosion. If you don’t know which is the negative cable, let someone else do the work.
- If you get everything ready before you begin the switch, you can sometimes make the change quickly enough that the radio retains its station settings.
- In most vehicles, if the battery is only disconnected for a minute or two, the computers will not generate a battery code. If a code does appear, you might need to have it cleared at a shop or parts store.
- The computers in most new vehicles go through a learning process that adapts to the way you drive. If the battery is disconnected for awhile, the computer might revert to its default settings. This is something you might not even notice, but if happens, all you have to do is drive normally and the computer will re-adapt to your driving style.