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SigmasTek  |  SKU: BW-4929

Enerwatt WP3.3-12 UPS Compatible Replacement Battery

Sale price $19.19 USD Regular price $27.82
Shipping calculated at checkout.

➤ Replacement battery for Enerwatt WP3.3-12 UPS unit

➤ High rate discharge for short bursts of high power

➤ Valve regulated spill-proof and low self-discharge

➤ UL recognized and CE certified with 1-year warranty

➤ Factory fresh and OEM compatible


📦🚀 FAST SHIPPING: Usually ships same day if ordered before 2 PM EST

⚠️ 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.

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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

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: 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 | 3.5 Ah

Terminal Type

F1

SigmasTek SP12-3.5 Replacement for Enerwatt WP3.3-12

Bring dependable backup power to your Enerwatt WP3.3-12 with the SigmasTek SP12-3.5 replacement UPS battery. Engineered for compatibility, steady performance, and safe operation, this high-performance UPS battery offers the immediate energy delivery that many UPS systems require. For proper connection, please reuse all existing cables and hardware from your original setup when installing this replacement UPS battery.

Key Specifications

  • Brand: SigmasTek
  • Model: SP12-3.5
  • Voltage: 12 Volts
  • Capacity: 3.5 AH
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof Construction
  • Feature: Low Self-discharge
  • Feature: High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty

Benefits

As a high-performance UPS battery, the SigmasTek SP12-3.5 is tailored for applications where rapid, high current output is necessary for short intervals. The high rate discharge design provides responsive power to the Enerwatt WP3.3-12 during outages, ensuring minimal disruption to connected devices. Low self-discharge extends the battery’s usable life during storage, making it a practical and long-lasting battery option for both emergency and standby use.

Valve regulated, spill-proof construction enhances safety and simplifies handling and maintenance. High vibration resistance contributes to longer service life in environments subject to movement or vibration. The battery’s U.L. recognition and CE certification mean it adheres to established safety and quality standards. Each battery is brand new and factory tested to meet or exceed OEM performance expectations.

Recommended applications include Uninterruptible Power Supply (UPS) units like the Enerwatt WP3.3-12, emergency power systems, and battery-powered tools that require dependable bursts of energy. Our technical team verifies each unit so you can trust consistent, reliable performance when it matters most.

Ready to upgrade your Enerwatt WP3.3-12 with a reliable replacement UPS battery? Buy the SigmasTek SP12-3.5 today for fast shipping, dependable performance, and a 1 year warranty.


Payment & Security

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