Where This Guide Comes From

Every fact and number in this guide comes from a single source video: Extreme Kartz, "Don't make these mistakes when buying GOLF CART LITHIUM BATTERIES" (136,834 views · 1,991 likes · 4:10. Garrett, who sells golf cart lithium setups daily, lists the six mistakes that keep costing owners money.). We transcribed the full video, kept his reasoning, examples and numbers, and added our own technical notes where useful — everything below is grounded in what he actually said on camera.

Extreme Kartz — "Don't make these mistakes when buying GOLF CART LITHIUM BATTERIES"
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136,834 views · 1,991 likes · 4:10. Garrett, who builds and sells golf cart lithium setups, runs through the six mistakes he sees buyers make every week.

Switching a golf cart from lead-acid to lithium is usually a one-day job that doubles your usable range and kills the maintenance. The catch is the buying part: Garrett at Extreme Kartz sees owners overpay for things they do not need, save a few bucks on packs that disappoint, and even follow AI-generated advice from golf cart articles. This guide walks through his six mistakes, in order, so you can avoid all of them.

Mistake #1: Skipping a Strong Brand Name

There are plenty of fly-by-night brands whose battery quality does not hold up — or who simply did not sell enough to stick around. Every lithium pack works fine for the first year or two; the problem shows up later, when the seller is gone and there is nobody to answer the phone. He recommends brands that are thoroughly tested, have been around, and have built a reputation on support. From the brands his shop has dealt with, the strongest are Eco Battery, Epoch Battery, Allied Battery, Bolt Energy and Trojan Lithium. Paying for the name is really paying for the company to still exist when you need it.

Mistake #2: Grabbing the Cheap Amazon Brand

His rule of thumb: if you do not know what the brand name means, stay away. The cheap Amazon packs almost never have US-based customer service, which makes installation help and future issues painful. More importantly, most of them run a BMS that was not designed with golf carts in mind — low continuous amperage output that is fine on flat ground with a two-seater, but struggles on hills or with a lifted cart. His shop regularly sees customers coming back for a replacement after throwing money at one of these. The marketing pictures show every use case; the spec sheet is what actually matters.

Mistake #3: Following Trends and Forum Advice

Picking a battery because it is the latest trend, or because one guy in a chat room said so, is how you end up paying for more than you need — or coming up short. Cart configurations vary too much for a one-size answer. What you actually need depends on your cart, your terrain and what you care about most, so match the pack to the cart instead of the hype.

Mistake #4: Forgetting What Mods Do to Range

A lifted cart, large tires, an upgraded controller or extra seats all draw more power, and each one eats into your expected drive range. Owners who forget this buy too small, then wonder why range collapsed. Before ordering, add up your mods and tell the seller — the answer will usually be more amp hours than you first thought. Range is not a spec sheet promise; it is a calculation based on your actual cart.

Mistake #5: Buying From a Call Center, Not a Cart Expert

An online seller that is really just a call center cannot guide you to the right solution, and will not be able to help when something goes wrong. If the people answering are not lithium battery experts, they cannot match a pack to a modified cart or debug an install. Buy where the support staff actually know golf carts — that is what makes the difference between a smooth install and a dead cart.

Mistake #6: Paying the Local Dealer Markup

Local dealers are often great people, but many charge a premium on the battery itself, and they usually only know the one brand they carry — so their advice is biased. His suggestion: buy the battery from an online store and have the local dealer install it, or install it yourself. It is a lot easier than you think, and the savings cover the tools. If you do use a dealer, treat the install as the paid service and the battery as the shopping decision.

How to Match Amp Hours to Your Cart

The pattern behind all six mistakes is the same: buyers pick a price or a trend instead of sizing to the cart. Work backwards instead. Start with your driving pattern — holes per day, hills, passenger count — add a margin for your mods, then choose the amp-hour rating that clears that number comfortably. A 100Ah 48V pack handles most standard carts; lifted or hill-heavy carts should step up. When in doubt, the seller should be able to run this math with you; if they cannot, that is mistake #5 in action.

The Bottom Line

Lithium is the right upgrade for almost every cart owner, but the buying process separates a good deal from a costly one. Buy a brand that will still exist in five years, skip the mystery Amazon packs, size for your actual mods, and buy from people who know carts — not call centers. Do that, and the switch pays for itself in range and years of zero maintenance.

Tell us your requirement and we will engineer it. Dajiu Energy is a Chinese battery factory that builds lithium packs for OEM and ODM customers worldwide. Our product range covers LiFePO4 drop-in replacement batteries, EV and golf cart batteries, wall-mounted home storage, portable power stations, commercial energy storage and battery swap cabinets — explore the full lineup in our product center, or browse more buying guides.

What Viewers Are Asking (Top Comments on the Video)

These are the most useful threads from the video's top comments. Creator replies are quoted verbatim; where the creator did not reply, we wrote a short "Our take" answer instead.

@martinsmith3495 · 17 likes
"I purchased one of those cheap Amazon batteries and I'm going on year two with it and it's still going strong so maybe Eco battery can lower the price about 1000 bucks and they'd be a lot cheaper to buy"
Our take: Fair pushback, and the channel replied with the counterpoint: all lithium works fine for a year or two; year 3+ is where quality shows. A budget pack that dies in year three still costs more than a brand battery that runs for a decade.
@extremekartz · 2 likes
"Hi Roger. That's a lot, even if you're hiring someone else to install it for you. Typical install costs is $300-400. Since it's hilly in your neighborhood, you'll want something higher powered."
Our take: Creator reply: install labor typically runs $300–400, and terrain dictates power — hilly neighborhoods need a higher-powered pack, not just a bigger battery.
@michaelcline1448 · 2 likes
"Are dc house a good choice"
Our take: Creator reply: we cannot in good conscience recommend DC House, although they have been OK for some. Keep in mind, all lithium works fine for a year or two; it's year 3+ where the quality matters. They didn't build it for durability.
@arkbama6 · 1 likes
"I want to upgrade to Lithium. I have an EZ Go 1989 with six Trojan acid batteries. I want to switch to Lithium. Recommends?"
Our take: Creator reply: that's a tough one because we aren't familiar with the IRGCs, especially if it's a 60V. If there is an aftermarket lithium battery that would work for it, it would be made by Lithium Rhino.
@laurenmarovich3234 · 1 likes
"I put a 48 V DC house lithium phosphate in my 2009 star cart and it wont go. Lights and horn work but it won't move forward or reverse. Do you have any idea why that might be?"
Our take: Our take: lights and horn running tells you the pack is fine and the cart has power; the issue is between the controller and the motor. Common causes with a new pack: the controller needs the pack's BMS to close its pre-charge contactor (the cart 'wakes up' when you hit the pedal), an incompatible controller profile, or a low-voltage cutoff set for lead-acid that never matches lithium. Start with the controller manual and check for a lithium/AGM mode switch.
@jeffcleveland5523 · 1 likes
"What would you recommend for a 2011 Yamaha YDREX 48v, used only for golfing 9-27 holes with some hills? It has a stock controller,solenoid and tires; no lift kit."
Our take: Our take: a stock, unmodified 48V cart on hilly terrain is the textbook case for a mid-size brand pack in the 100–120Ah range. With no lift or big tires, it has no extra range penalty, so a 100Ah pack clears a full 18 holes with margin. Stick with the brands Garrett lists and size up only if you add a lift later.
@liatris69 · 1 likes
"Local dealers will markup the install to make up for losing the sale to an online store… I don't think my friend with zero tools and a new manicure is going to want to muck around a battery compartment. Just saying."
Our take: Fair point — if you have no tools and no desire to work in a battery compartment, paying the dealer for install is fine. The video's advice is to buy the battery online and treat install as a paid service, not to hand the dealer both decisions.
@larrylaffer6015 · 0 likes
"Seems to me with the "name brand" batteries you are paying up front for the 8 to 10 year warranty, paying in the $2500 to $3000 or more range. The Amazon "cheap" batteries mostly come with a 3 year warranty and are $1000 or less."
Our take: The math is really warranty economics: a brand pack at $2,500–3,000 buys an 8–10 year warranty from a company that will still exist; a $1,000 pack buys three years and a lottery ticket. Over a decade, the cheap route usually costs more — plus the downtime when it dies mid-season.

Source video: Extreme Kartz — "Don't make these mistakes when buying GOLF CART LITHIUM BATTERIES" (youtube.com/watch?v=Ue5vBt2tZAM). Comment excerpts are quoted verbatim from the video's top comments; creator replies are quoted from the channel, and answers marked "Our take" are Dajiu Energy's own. Figures are transcribed from the video's own statements.