National NB12-0.8 Reliable Replacement Battery
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⚠️ Quick Reminder
🔹 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.
📸 Send Your Battery Photo / Unsure? Expert Help
Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.
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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 | 0.8 Ah
Terminal Type
Special Connector
National Battery NB12-0.8 Replacement Battery - Compatible with SigmasTek
The National Battery NB12-0.8 is a dependable replacement battery engineered to provide consistent 12 Volt power and dependable runtime for SigmasTek-compatible systems. This compact, high-performance battery is built to deliver reliable energy for a range of applications, from backup power systems to portable instruments. If you need a long-lasting battery that combines steady output with a small form factor, the NB12-0.8 is a smart choice for technicians and end users alike.
Key Specifications
- Manufacturer: SigmasTek
- Brand Replacement: National Battery
- Model: NB12-0.8
- Voltage: 12 Volts
- Amp Hours: 0.8 Ah
- Length (in.): 3.78
- Width (in.): 0.98
- Height (in.): 2.44
- Weight (lb.): 1.65
Benefits
- Durability: Built to last through routine use and standby periods, the NB12-0.8 provides dependable service life under normal operating conditions.
- Long Life: Designed as a long-lasting battery to reduce maintenance frequency and extend uptime for critical systems.
- High Performance: The 12 Volt output and 0.8 Ah capacity deliver stable power suitable for delicate electronics and control systems.
- Compact Size: Small dimensions allow for easy installation in tight compartments and older device housings that require the NB12-0.8 form factor.
- Broad Use Cases: Ideal for UPS and emergency backup systems, alarm panels, security devices, medical standby equipment, and small portable tools that accept this battery size.
- Simple Replacement: Designed for direct substitution, this replacement battery makes swaps quick, minimizing downtime during routine service or emergency replacements.
- Reliable Backup: Trusted for maintaining critical functions during power interruptions, providing peace of mind for safety and monitoring applications.
Ready to restore reliable power? Purchase the National Battery NB12-0.8 replacement battery today and secure a high-performance, long-lasting battery solution for your SigmasTek-compatible equipment.
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