BigKat Battery | Battery Rebuild
🔋 BigKat E-Bike Battery Rebuild Service
Restore your BigKat battery to reliable, high-performance output—or upgrade it for more range and power in demanding terrain.
At EMP, we specialize in rebuilding BigKat e-bike batteries using premium lithium-ion cells and precision assembly. Whether your battery has lost capacity or you need dependable performance for off-road, hunting, or backcountry use, we’ve got you covered.
⚙️ What We Do
We rebuild your existing BigKat battery, replacing all internal cells while maintaining the original case, fitment, and compatibility with your bike.
- Complete internal cell replacement
- Optional capacity and performance upgrades
- Retains original mounting system and connectors
- Fully tested before return shipment
🔧 BigKat Models We Service
We support a wide range of BigKat e-bike models. Below are some of the most common:
🟢 BigKat Ranger Battery Rebuild
A versatile all-terrain model built for rugged outdoor use.
- Fully serviceable battery platform
- Upgrade options available for increased range
- Strong performance across mixed terrain
Perfect for riders who want: dependable power and extended ride time in outdoor conditions
🟢 BigKat Fat-Tire Models Battery Rebuild
Designed for off-road riding, snow, sand, and rough terrain.
- Upgrade options for improved capacity and output
- Stronger performance under load
- Ideal for high-demand riding environments
Perfect for riders who need: reliable power in tough terrain
🟢 BigKat Hunting / Utility Models
Built specifically for hauling gear and long backcountry rides.
- High-demand capable rebuild options
- Upgrade paths for extended range and durability
- Designed for heavy use and consistent output
Perfect for riders who want: long-range capability and reliability in remote areas
🟢 Other BigKat Models
We can also service additional BigKat models not listed above.
If you're unsure, simply send us photos of your battery and we’ll confirm compatibility.
🔋 Upgrade Options
Built for riders who demand more.
BigKat batteries are excellent candidates for performance upgrades using premium cells such as Samsung, LG, or Molicel.
Upgrade benefits:
- Increased range for long backcountry rides
- Stronger power delivery under load
- Reduced voltage sag during climbs and acceleration
- Extended lifespan (typically 3–5 years with proper care)
🧪 Diagnostics & Testing
Every battery goes through a detailed in-house process:
- Initial inspection and diagnostics
- Precision rebuild with matched high-quality cells
- BMS functionality evaluation
- Full charge/discharge testing before shipment
⚠️ Important Notes on BigKat Batteries
BigKat batteries are generally serviceable, but like many modern systems, they may include smart BMS electronics.
- If the issue is related to the BMS or communication system, repair options may vary
- In such cases, we’ll provide clear diagnostics and honest recommendations
📦 How the Process Works
1. Fill Out Intake Form
Complete the Battery Service Intake Form
2. Ship Your Battery
Send your battery (charger recommended but optional)
3. Evaluation & Invoice
We inspect and confirm final pricing if not prepaid
4. Rebuild & Test
Your battery is rebuilt, balanced, and tested
5. Return Shipment
We ship your battery back with tracking information
⏱ Turnaround Time
- Current estimate: 6–8 weeks
- Expedited service available upon request
💰 Pricing
- Typical rebuild cost: $450 – $650
- Performance upgrades or higher-capacity builds may increase cost
- Return hazmat shipping: typically $50–$60
✅ Why Choose EMP?
- U.S.-based battery specialists
- Premium, high-performance lithium-ion cells only
- Honest diagnostics and transparent communication
- Experience with off-road and high-demand battery systems
🚫 Please Note
- This is a battery rebuild service, not a new battery purchase
- You must send in your original BigKat battery
- We do not typically stock ready-to-ship BigKat batteries
🔧 Battery Rebuild Service
We rebuild your existing battery using fresh, high-quality cells to restore or increase capacity and performance.
- Full disassembly, rebuild, and testing
- Upgraded capacity options available
- Uses brand new name-brand cells
- Turnaround time: Approximately 14 business days
- Timeline includes the time it takes for us to receive your battery and complete the rebuild
⚡ Custom Battery Builds
Fully custom battery solutions designed to meet your exact specifications. This is ideal for unique applications or when a standard battery will not fit your needs.
- Custom shapes and sizes
- Custom BMS (Battery Management System) configurations
- Choice of cells and performance levels
- Option for enclosed case or raw (naked) pack
- Built specifically for your application
- Turnaround time: Approximately 21 business days
🔋 Battery Packs (Encased)
Battery packs built using one of our in-stock cases. These are a great option if you want a reliable, ready-to-fit solution.
- Uses pre-designed cases from our inventory
- Proven, reliable configurations
- Faster than fully custom builds
- Turnaround time: Approximately 14 business days
🔬 Battery Cells (Individual Cells)
We supply high-quality lithium-ion cells for repairs, upgrades, and custom builds.
- In-stock cells: Ship within 3–6 business days
- Out-of-stock (air shipping): Approximately 10 business days
- Out-of-stock (sea shipping): Approximately 40 days
📦 Shipping & Intake Process
- Place your order or request a quote
- Fill out our Battery Intake Form
- Send in your battery (include charger and key if required)
- We inspect and test your battery
- We contact you with results and recommended options
Important Information
Turnaround times begin once your battery is received and checked into our system.
During high demand periods or for complex builds, timelines may be slightly extended.
Shipping Method
- All batteries are shipped via ground service only (FedEx or UPS) in compliance with DOT and IATA regulations for lithium batteries.
- Expedited air shipping is not available for lithium battery products.
Delivery Time
- Ground shipping typically takes 3–7 business days within the U.S.
- Tracking information will be provided as soon as your order ships.
Local Pickup
- Pickup is available at our Las Vegas facility:
4856 Judson Ave Suite 155 Las Vegas, NV 89115
Monday– Thursday, 9:00 AM – 4:00 PM ( Friday by appointment).
Returns
- Returns are accepted within 14 days of delivery on unused, unopened batteries.
- For rebuilds and custom packs, all sales are final unless defective.
Important Notes
- Shipping is limited to the continental United States.
- Customers are responsible for providing a valid shipping address — carriers cannot deliver to P.O. Boxes.
- Signature may be required at delivery for higher-value battery orders.
