Bad Boy Buggies 48V Lithium Battery Conversion Kit — Classic, Buggy & XD | Fleet Lithium
Features
Features
Backed by a 10 Year Warranty
Backed by a 10 Year Warranty
Bad Boy Buggies 48V Lithium Battery Conversion Kit — Classic, Buggy & XD | Fleet Lithium - 51V 105Ah is backordered and will ship as soon as it is back in stock.
Drop-In Lithium Power for Your Bad Boy Buggies 48V
Replace all six lead-acid batteries in your Bad Boy Buggies 48V (Classic, Buggy, XD — all years) with a single, lightweight 51V LiFePO4 lithium battery conversion kit from Fleet Lithium. The factory Bad Boy uses six 8V batteries wired in series (48V total). Our drop-in kits consolidate all of that into one compact unit — no rewiring, no programming, no special tools.
Choose the capacity that matches your driving needs and enjoy longer range, faster charging, and maintenance-free performance for years to come.
Choose Your Range
| Capacity | Energy (kWh) | Estimated Range | Best For |
|---|---|---|---|
| 51V 105Ah | 5.38 kWh | Up to 50 miles* | Daily driving, golf, errands |
| 51V 168Ah | 8.60 kWh | Up to 75 miles* | All-day use, hunting, ranch |
| 51V 210Ah | 10.75 kWh | Up to 90 miles* | Maximum range, fleet & commercial |
Cold-Weather Charging Protection — Standard on Every Pack
Every Fleet Lithium battery includes a built-in heater that activates automatically when charging below 32°F (0°C). This protects the cells during cold-weather charging — no extra charge, unlike competitors who charge $200–$400 for heated versions.
What's Included
- 51V NexGen Fleet Lithium LiFePO4 Battery (your selected capacity)
- CH5618 — 58.4V 18A LiFePO4 Smart Charger
- BR5204 — Bad Boy Buggies 48V Vehicle-Specific Bracket Kit
- AC0219 — AC Power Connector
- CB0917 — Heavy-Gauge Battery Cable Set (35.4")
- VR4812 — 48V to 12V Voltage Reducer (for lights & accessories)
- Digital State-of-Charge (SOC) Gauge
- All mounting hardware — complete bolt-in installation
Why Fleet Lithium?
- ✔ 300A NexGen BMS — 800A peak surge for demanding hill climbs
- ✔ Patent-Pending Fire Suppression — stops thermal runaway before it starts
- ✔ Bluetooth Monitoring — check health, voltage, temp from your phone
- ✔ 10-Year Warranty — industry-leading coverage
- ✔ Designed & Assembled in the USA
- ✔ True Drop-In — no rewiring, no reprogramming
Fitment
| Model | Years | Factory Voltage | Compatible |
|---|---|---|---|
| Bad Boy Classic | All Years | 48V | Yes |
| Bad Boy Buggy | All Years | 48V | Yes |
| Bad Boy XD | All Years | 48V | Yes |
All kits use the same BR5204 bracket and are fully compatible with the factory 48V DC controller. No upgrades or reprogramming needed.
FAQ
Will this fit my Bad Boy Buggies? Yes. The included BR5204 bracket kit ensures a secure, factory-fit installation for all 48V Bad Boy models. No modifications required.
Do I need to reprogram my controller? No. The factory 48V DC controller accepts the 51V lithium pack out of the box.
How long does installation take? 30–60 minutes with basic hand tools.
Does it work in cold weather? Yes. Built-in heater activates automatically below 32°F for safe cold-weather charging. The heater does not run during discharge/driving.
Will my 12V accessories still work? Yes. The included VR4812 voltage reducer steps the 51V pack down to 12V for your lights, horn, gauges, and accessories.
Which capacity should I choose? 105Ah for up to 50 miles (most popular), 168Ah for up to 75 miles, or 210Ah for up to 90 miles maximum range.
*Range estimates represent maximum distance under ideal conditions (flat terrain, single occupant, 12–15 mph, fully charged, 70°F). Actual range varies based on terrain, weight, speed, temperature, and driving habits.
Let customers speak for us
This is a very high quality battery easy to install, so happy to be rid of the nasty corrosive lead cell batteries. Hopefully I’ll get many years of service out this battery and I’m sure I will, just the getting rid of the lead cell maintenance is a huge win. The cost of corroded cables, hold down brackets and adding water was a pain in the butt.
Nice and easy install, they work great, much longer range and way better power. Best of all, NO MAINTENANCE
Tried cheaper lithium setups first and they couldn’t handle the amp draw. This one has been solid with no issues.
Absolutely Incredible Range. We replaced our 4 year old Trojan batteries this spring with the 210 AH dual battery kit and we are blown away! We use the buggy to secure the perimeter of a 300 acre lot in South Carolina. We typically put about 200 miles per week on this unit. We have been testing this kit for about a month now and we are getting every bit of 80 miles per charge. Its absolutely unbelievable. Thank you Fleet Lithium!
This screen was so easy to install. We installed our fleet lithium battery about 2 years ago, the screen just came out in April, it took 10 minutes to install and everything works perfectly. Thank you Fleet lithium!
After a few months of use I can confidently say this was worth it. No maintenance, great range, and consistent power every time. Huge upgrade from stock.
I should have just bought this first instead of wasting money on others.
The range has doubled compared to my old setup. Installation was straightforward and the instructions were clear. I can now play multiple rounds without recharging.
Real world use, not just cruising. This battery actually performs.
I love the Bluetooth monitoring features. No more voltage sag even on steep hills. It's a night and day difference from lead-acid batteries.
Installation was straightforward and the instructions were clear. No more voltage sag even on steep hills. The battery runs cooler and is much lighter than my old one.
This kit exceeded my expectations. The Ranger runs smoother, quieter, and more efficiently. Would absolutely buy again.
No more voltage sag even on steep hills. Installation was straightforward and the instructions were clear. The battery charges quickly and holds power for a long time.
The battery runs cooler and is much lighter than my old one. No more voltage sag even on steep hills. The range has doubled compared to my old setup.
This is the best upgrade I’ve done to my cart. Everything fit perfectly without any modifications. Customer service was helpful with my questions.
