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SigmasTek  |  SKU: BW-4908

Enerwatt WPHR12-38 UPS High Performance Replacement Battery

Sale price $92.48 USD Regular price $134.10
Shipping calculated at checkout.

➤ Brand new replacement for Enerwatt WPHR12-38 UPS battery

➤ High rate discharge design delivers superior power output

➤ Valve regulated, spill-proof construction for safe use

➤ Low self-discharge and high vibration resistance

➤ U.L. Recognized, CE Certified with 1 year warranty


📦🚀 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 | 35 AH

Terminal Type

Internal Thread

SigmasTek SP12-35 (12V 35AH) Replacement for Enerwatt WPHR12-38

This SigmasTek SP12-35 replacement UPS battery is engineered for the Enerwatt WPHR12-38 Uninterruptible Power Supply (UPS). Specifically designed for high rate discharge UPS applications, it delivers superior short-term power output when your system requires bursts of energy. The battery is brand new, factory fresh, and tested to meet or exceed OEM specifications—providing a dependable, long-lasting battery solution for critical backup and portable applications.

Key Specifications

  • Compatible Model: Enerwatt WPHR12-38
  • Brand: SigmasTek (SP12-35 IT)
  • Voltage: 12 Volts
  • Capacity: 35 AH
  • Terminal Type: Internal Thread
  • 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
  • Performance: Superior Performance
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year Warranty

Benefits

  • Durability: Valve-regulated, spill-proof construction and high vibration resistance make this battery robust in mobile or shock-prone installations, ensuring reliable operation in UPS systems and field applications.
  • Long Life: Low self-discharge properties help preserve stored energy and extend shelf life, making this a truly long-lasting battery for standby and seasonal usage.
  • High Performance: Engineered for high rate discharge situations, this SigmasTek unit provides the elevated current required for short durations without compromising stability—ideal for UPS units that must sustain critical loads during outages.
  • Maintenance-Free: Valve-regulated design eliminates the need for routine maintenance, while internal thread terminals simplify secure installation using your existing cables and hardware.
  • Typical Applications: Suited for Uninterruptible Power Supply (UPS) units like the Enerwatt WPHR12-38, emergency power supply systems, and battery-powered tools that demand reliable backup power.
  • Quality & Testing: Each battery is factory fresh and personally tested to meet or exceed OEM-type performance, giving you confidence in a high-performance UPS battery replacement.

Replace your Enerwatt WPHR12-38 battery with this tested, reliable SigmasTek SP12-35 unit today. Buy with confidence for a high-quality, long-lasting battery backed by a 1 year warranty — order now to restore full backup capability and protect your critical equipment.


Payment & Security

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