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SigmasTek  |  SKU: BW-1800

Door King 1835 UPS T2 High Performance Replacement Battery

Sale price $24.99 USD Regular price $35.45
Shipping calculated at checkout.

➤ One SigmasTek SP12-9HR battery (12V 9AH) for Door King 1835 UPS unit

➤ High rate discharge design for quick energy delivery during power loss

➤ Valve regulated and spill-proof for safe, maintenance-free use

➤ Low self-discharge and high vibration resistance improve durability

➤ U.L. recognized, CE certified, includes 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 | 9 AH

Terminal Type

F2

SigmasTek SP12-9HR Replacement Battery for Door King 1835

Replace the battery in your Door King 1835 with the SigmasTek SP12-9HR high-performance UPS battery. Specially designed for compatibility and reliable backup power, this brand new battery is an excellent choice for access control, emergency backup, and other UPS applications that demand consistent, long-lasting performance. Be sure to use your existing cables and hardware from the original setup when installing this battery.

Key Specifications

  • Brand: SigmasTek
  • Model: SP12-9HR
  • Compatible UPS Model: Door King 1835
  • Voltage: 12 Volts
  • Capacity: 9 AH
  • Terminal Type: F2
  • Design: High Rate Discharge Design
  • Construction: Valve Regulated Spill Proof
  • Self-discharge: Low Self-discharge
  • Vibration Resistance: High Vibration Resistance
  • Certifications: U.L. Recognized and CE Certified
  • Condition: Brand New, Factory Fresh
  • Warranty: 1 Year
  • Typical Applications: Uninterruptible Power Supply (UPS), Emergency Power Supply, Battery Powered Tools

Benefits

The SP12-9HR replacement UPS battery provides dependable power delivery and extended readiness for Door King 1835 applications. The high rate discharge construction allows the battery to supply greater power for short durations—useful for gate motors, access systems, and other devices that draw intermittent high current. Low self-discharge preserves capacity during standby periods, contributing to a long-lasting battery profile and fewer replacements over time.

Designed with valve regulated, spill-proof housing and high vibration resistance, this battery performs reliably in a range of installation environments while maintaining safety and minimal maintenance. U.L. and CE certifications add confidence for commercial and residential installations that require certified components. Tested to meet or exceed OEM standards, this SigmasTek unit serves as a practical, high-performance UPS battery replacement.

If you need help confirming the right replacement for Door King 1835, our customer service team is available at (800) 657-1303. We typically ship in-stock items within 24 hours to get your system back online quickly.

Buy this high-performance replacement UPS battery for your Door King 1835 now to secure reliable, long-lasting battery backup for your critical equipment.


Payment & Security

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