Posted: 04/04/2025
Golf carts need more than just a key and a pedal. They need solid power. Nothing kills the vibe faster than a dead battery halfway through a round.
Lead-acid batteries are cheap but high maintenance. AGM ones are easier to deal with and still affordable. Lithium batteries cost more, but they’re lighter, charge quicker, and last longer. It really comes down to how often you use your cart and how much upkeep you’re willing to do.
Pick the right battery, and you’re not just avoiding the push of shame. You’re making sure the whole ride runs smoothly from hole 1 to 18.
If you're looking for power that goes the distance, the Deka GC45 is about as solid as they come. It's a six-volt deep-cycle battery with a big number where it counts: 255 amp hours. That’s a whole lot of runtime, especially if you’re trying to make it through a full day on the course or cruising around the neighborhood without worrying about a mid-day charge. This battery isn’t just about getting you from point A to B. It’s about getting you there and back... more than once.
It’s built for endurance. The GC45 is designed to handle regular, deep discharges and bounce back consistently. That’s what deep-cycle batteries do best. They’re not made for short bursts of energy like a car battery. They’re made for steady output over longer periods. So whether you’re running a golf cart, a utility vehicle, or any equipment that needs a reliable source of power for hours on end, the GC45 delivers.
Now, it’s not light. It weighs 77 pounds, which can be a hassle if you’re moving or replacing multiple batteries. But there’s a reason for that weight. It’s packed with lead, which means longer lifespan and better energy storage. You’re trading a little convenience for a lot of performance. Most carts that use 36V systems will need six of these, so yeah, that’s a bit of weight; but once they’re installed, you’re good to go for a long time.
It also uses standard top post terminals, so it’ll fit in most setups without needing anything fancy. It’s tried-and-true gear for people who just want their battery to work every time they turn the key.
For 48V systems (or setups where space is tight) the Deka GC8V makes a lot of sense. This one gives you eight volts and 165 amp hours, and weighs in at 68 pounds. It’s noticeably more compact than the GC45, which is great if you're working with a battery tray that doesn’t leave much wiggle room.
This battery’s versatility is part of what makes it appealing. It’s not just a golf cart battery. It’s used in marine equipment, industrial machines, even some off-grid setups. Basically, anything that needs reliable, deep-cycle power but can’t make room for a heavier or larger unit. That flexibility is why it's become a go-to option in a lot of different setups.
Even though it has a lower amp-hour rating than the GC45, the GC8V still holds its own when paired correctly in a system. With six of these in a 48V cart, you're getting strong, consistent performance across the board.
One important note: the positive terminal is on the left. That might seem like a small detail, but it matters. Installing it incorrectly—or mixing it up during a replacement—can fry wires or damage components. So, take a second and double-check before connecting. It's a small step that saves you from a big headache.
And while the GC8V is lighter and more compact, it doesn’t compromise on quality. Like the GC45, it’s a deep-cycle battery built for durability. It's just designed to fit a different kind of cart or setup.
If the GC45 is built for long hauls and the GC8V is made for tighter fits, the Deka GC25 sits right in the middle. It offers six volts, 235 amp hours, and weighs 68 pounds, just like the GC8V. So it’s lighter than the GC45, but still gives you strong, steady performance.
This is the kind of battery that works well for most everyday golf cart users. You’re getting deep-cycle power that’s solid and reliable, and the price point is a bit more forgiving than the top-end models. It’s not the longest-lasting battery in the lineup, but it gives you a solid mix of runtime, durability, and affordability. For most users, especially those who don’t run their cart every single day, this is more than enough battery.
It’s also good for seasonal users, like people who golf in warmer months and store their carts in the off-season. You’ll still want to keep it charged and maintained, but the GC25 can sit for a while (as long as it’s stored correctly) and still hold up when you bring it back out.
Just like the others, it uses standard terminals and works well in 36V setups. For folks who want dependable power but don’t necessarily need maximum runtime, the GC25 checks all the boxes.
Let’s break down the numbers a bit, because they do matter. The first thing to look at is voltage. This tells you how many batteries you need to hit your cart’s total system voltage. For example, six 6V batteries make a 36V system. Six 8V batteries give you 48V. The right voltage setup depends entirely on your cart—so check before buying.
Amp hours (Ah) are just as important. This number tells you how much capacity the battery has—basically, how long it can provide steady power before it needs to be recharged. Higher amp-hour ratings mean longer runtime. If you’re planning to use your cart for hours without recharging, aim for the higher end.
Then there’s reserve capacity. That’s a measure of how long the battery can run when it's partially discharged. It’s like the backup endurance stat. More reserve capacity means your battery won’t tap out as quickly if it gets pushed a little harder.
Weight might seem like a minor thing, but heavier batteries often have thicker plates and more lead, which can translate to longer life and more consistent performance. Of course, heavier also means harder to install and move.
So, how do you pick the right one? Start with your cart. Is it a 36V or 48V system? That answers half the question. Then ask yourself how often you use it, how far you usually go, and how much you’re willing to spend, not just up front, but also in maintenance.
Go with the Deka GC45 if you want long runtime and don’t mind the weight. It’s made for extended use and will hold up under regular, deep discharges.
Choose the GC8V if your cart runs on 48 volts or space is a concern. It gives you solid performance without taking up too much room.
The GC25 is ideal if you want reliable performance without going all-in. It’s a balanced option that works well for most casual or moderate users.
No matter which one you pick, make sure it fits your cart’s specs, your usage, and your expectations. Cutting corners on the battery often leads to more problems later.
If you're replacing your golf cart battery, don’t just grab the first one you see. Start by checking the voltage: 6V, 8V, or whatever your system calls for. Make sure the physical size fits your battery compartment. And pay attention to terminal placement. The wrong setup can lead to connection issues or, worse, damage.
Your owner's manual will have all the info you need. If it’s not handy, ask someone who works with batteries regularly, like the friendly folks at Arnold Motor Supply, who can help match you with the right one.
And one quick tip: don’t use a car battery. They're not made for the kind of steady, deep power golf carts need. You’ll wear it out quickly, and probably end up walking. Which is fine...unless you’re halfway through the course and far from done.
Batteries need some attention if you want them to last. For lead-acid types, distilled water is a must—keep the cells topped off, but not overfilled. Letting them run dry? That’s a quick way to cut their life short.
Don’t forget the terminals. Corrosion builds up over time and messes with performance. A simple mix of baking soda and water can clean them up fast. Just be careful around the connections. Clean terminals mean better power flow, less strain, and fewer headaches.
And charge the battery regularly. Leaving it dead for too long? That’ll age it fast. Lead-acid batteries aren’t built to sit around without a charge. Think of it like a car—oil changes, tire rotations, the works. Same idea here. A little upkeep now saves you money and trouble later.
Arnold Motor Supply has been a leading supplier of auto parts since 1927. Founded and based in Iowa, we have auto parts stores all over the Midwest. Buy car parts online, and you'll be notified via email once your purchase is ready for pickup at your local Arnold Motor Supply.
