Drop-In Lithium Power for Your Bad Boy Buggies 48VReplace 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 PackEvery 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.FAQWill 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. {"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"Will this fit my Bad Boy Buggies?","acceptedAnswer":{"@type":"Answer","text":"Yes. The included BR5204 bracket kit ensures a secure, factory-fit installation for all 48V Bad Boy Classic, Buggy, and XD models. No modifications required."}},{"@type":"Question","name":"Do I need to reprogram my controller?","acceptedAnswer":{"@type":"Answer","text":"No. The factory 48V DC controller accepts the 51V lithium pack out of the box."}},{"@type":"Question","name":"How long does installation take?","acceptedAnswer":{"@type":"Answer","text":"30-60 minutes with basic hand tools."}},{"@type":"Question","name":"Does it work in cold weather?","acceptedAnswer":{"@type":"Answer","text":"Yes. Built-in heater activates automatically below 32F for safe cold-weather charging. The heater does not run during discharge or driving."}},{"@type":"Question","name":"Will my 12V accessories still work?","acceptedAnswer":{"@type":"Answer","text":"Yes. The included VR4812 voltage reducer steps the 51V pack down to 12V for your lights, horn, gauges, and accessories."}},{"@type":"Question","name":"Which capacity should I choose?","acceptedAnswer":{"@type":"Answer","text":"105Ah for up to 50 miles (most popular), 168Ah for up to 75 miles, or 210Ah for up to 90 miles maximum range."}}]}
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