Theradyne Instigator High Performance Wheelchair Replacement Battery
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    🔹 Please ensure the original battery model number is listed in our product description and that your device model number matches for compatibility.
   🔹  We only supply the batteries shown in the images. Device images are provided for reference only.
  
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Battery Care Guide
                      
                    
                  
                  Battery Care Guide
Battery Usage and Maintenance Guidelines 🔋
Please read the following instructions carefully before using your new battery. Proper adherence will help ensure optimal performance and extended service life.
1. Cordless Phones, PDAs, and Power Tools (NiMH, NiCd, Lithium-Ion) 📱
Initial Charge
- Fully charge the battery overnight prior to first use.
Conditioning (First 2–6 Charge Cycles)
- Operate the device until the battery reaches approximately 20% capacity.
- Avoid premature recharging.
- Do not allow the battery to fully discharge during the initial cycles.
Post-Conditioning
- Recharge the battery only when necessary.
- These batteries are capable of approximately 500 charge cycles:
-   Once daily → ~500 days
 Twice daily → ~250 days
 Note: Even a partial recharge is considered a full cycle.
2. Sealed Lead Acid (SLA) Batteries 💡
- No conditioning required.
- Maintain the battery in a fully charged state; avoid complete discharge.
- Capable of 300–400 charge cycles.
- Expected service life: 2–3 years, depending on usage conditions.
3. Laptop Batteries (Lithium-Ion) 💻
Initial Charge
- Fully charge the battery overnight prior to first use.
Conditioning (First 2–6 Charge Cycles)
- Charge fully, then discharge to approximately 20% capacity.
- Avoid complete discharge, as some devices may not detect a fully drained battery.
Post-Conditioning
- Minimize frequent plugging and unplugging.
- Allow the battery to discharge moderately at least once per month to maintain optimal performance.
- Occasional cycling is recommended to sustain battery health.
Professional Recommendation
Adhering to these guidelines will enhance battery longevity and ensure reliable performance.
For further assistance regarding your battery or order, our customer support team is available to provide guidance.
                    
                      
Delivery and Shipping
                      
                    
                  
                  Delivery and Shipping
⚡ Everything You Need to Know About Shipping with BatteryWeb (USA)
We know reliable delivery matters when you need power fast. Here’s how BatteryWeb makes shipping easy across the USA:
🚚 Shipping & Delivery
Most orders ship next business day (some products like sealed lead acid may take a little longer).
Same-day shipping available if you order before 11:59 AM (delivery depends on the carrier).
We ship nationwide using FedEx, UPS, USPS, DHL, and regional ground carriers.
Shipping costs are calculated automatically at checkout based on weight, distance, and carrier.
Transit times shown are estimates only (business days, no weekends/holidays).
🌍 Shipping Restrictions
Lithium batteries cannot be shipped by USPS or air. They must go via FedEx Ground, UPS Ground, or DHL Ground.
PO Box deliveries are only available via USPS.
At this time, we do not ship lithium batteries to Puerto Rico. NiMH, NiCd, and Alkaline can be shipped.
📦 Important Notes
Double-check your shipping address! If an incorrect address is used and the order is returned, re-shipping costs are the buyer’s responsibility.
If a product is temporarily out of stock, we’ll notify you right away with the expected restock date—or issue a refund if you prefer.
💲 Currency & Pricing
All prices are shown in USD.
Orders shipped outside the USA may be subject to local taxes, customs fees, or import duties. These are the buyer’s responsibility.
⚡ At BatteryWeb, we’re committed to getting your batteries delivered quickly, safely, and affordably—so you’ll always have the power you need, when you need it.
                    
                      
Disclaimer
                      
                    
                  
                  Disclaimer
⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.
🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
🔹 Our products are generic replacement parts and are not affiliated with, endorsed by, or manufactured by the original equipment manufacturers (OEMs).
Volts & Amps
12 Volts | 35 AH
Terminal Type
Nut & Bolt
Replacement Theradyne Instigator Wheelchair Battery — SP12-35 NB (Theradyne Instigator)
This replacement battery is designed specifically for the Theradyne Instigator wheelchair and offers reliable compatibility, dependable performance, and proven long-term reliability. The SP12-35 NB (12 V 35 AH) replacement battery is factory fresh and engineered to meet the deep-cycle power demands of mobility devices. Whether you need a single replacement battery for your power chair or a high-capacity option for extended daily use, this high-performance battery delivers consistent output and peace of mind.
Key Specifications
- Model: SP12-35 NB
- Compatible with: Theradyne Instigator
- Voltage: 12 Volts
- Capacity: 35 AH
- Terminal Type: Nut & Bolt
- Technology: Absorbent Glass Mat (AGM) Technology
- Designed For: Deep Cycle Usage
- Construction: Valve Regulated Spill Proof Construction
- Energy Feature: Power/Volume Ratio Yielding Unrivaled Energy Density
- Certifications: U.L. Recognized and CE Certified
- Condition: Brand New, Factory Fresh
- Warranty: 1 Year Warranty
- Brand: SigmasTek
- Quantity Required: 1 battery
Benefits
This replacement battery provides a durable, long-lasting battery solution tailored for mobility equipment. AGM construction ensures maintenance-free operation and robust resistance to vibration and shock, making it ideal for daily wheelchair and scooter use. As a high-performance battery, it offers superior power density for extended run times and reliable deep-cycle performance for repeated discharge and recharge cycles. The valve-regulated, spill-proof design adds safety and convenience for indoor and outdoor applications.
Typical applications include electric wheelchairs, power chairs, mobility chairs, and mobility scooters. Beyond mobility devices, this long-lasting battery is also suitable for backup applications such as emergency power systems, UPS units, and light-duty tools that require dependable 12V power. The U.L. and CE recognitions provide assurance for safety and quality, and the factory fresh condition paired with a 1 year warranty protects your purchase.
This replacement battery is 100% compatible with your Theradyne Instigator when using your existing cables and hardware. Choose a replacement battery that delivers the performance you expect — factory fresh, performance guaranteed, and ready to ship. Buy your SP12-35 NB replacement today and restore dependable mobility power with a high-performance, long-lasting battery.
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