BigKat Battery | Battery Rebuild
36V NAKED PACK DIMENSIONS
All sizes below include holders, insulation, heat-shrink, wiring, and side-mounted high-current BMS allowance.
| Config | Capacity (Ah) | Cell Count | Dimensions (L × W × H, in) | Dimensions (mm) | Max Continuous (A) | Notes |
|---|---|---|---|---|---|---|
| 10S3P | 15Ah | 30 | 8.9 × 2.8 × 3.3 | 226 × 71 × 85 | 100A | Compact commuter |
| 10S4P | 20Ah | 40 | 8.9 × 3.7 × 3.3 | 226 × 94 × 85 | 120A | Good range upgrade |
| 10S5P | 25Ah | 50 | 8.9 × 4.6 × 3.3 | 226 × 117 × 85 | 150A | Mid-capacity |
| 10S6P | 30Ah | 60 | 8.9 × 5.5 × 3.3 | 226 × 140 × 85 | 180A | Balanced build |
| 10S7P | 35Ah | 70 | 8.9 × 6.4 × 3.3 | 226 × 163 × 85 | 200A | High power |
| 10S8P | 40Ah | 80 | 8.9 × 7.3 × 3.3 | 226 × 186 × 85 | 220A | Fleet / commuter |
| 10S9P | 45Ah | 90 | 8.9 × 8.2 × 3.3 | 226 × 209 × 85 | 250A | Heavy duty |
| 10S10P | 50Ah | 100 | 8.9 × 9.1 × 3.3 | 226 × 232 × 85 | 300A | Max 36V build |
- Free worldwide shipping
- In stock, ready to ship
- Backordered, shipping soon
🔋 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
Processing Time
- Most in-stock batteries ship within 3–5 business days.
- Custom rebuilds and special orders may take 7–14 business days before shipping.
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:
6585 S Arville St, Las Vegas, NV 89118
Monday–Friday, 9:00 AM – 5:00 PM (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.
