---
product_id: 587878356
title: "HQRP 3.6V Lithium Thionyl Chloride D-Size Battery Compatible with DSC ER34615M-T1 WT4911 WT4911B WT8911 ALEXOR Wireless Outdoor Siren WT4911BATT ADT"
brand: "hqrp"
price: "KD 11.45"
currency: KWD
in_stock: true
reviews_count: 8
category: "Hqrp"
url: https://www.desertcart.com.kw/products/587878356-hqrp-3-6v-lithium-thionyl-chloride-d-size-battery-compatible
store_origin: KW
region: Kuwait
---

# Up to 30min Depassivation 14.5Ah High Capacity 3.6V Lithium Power HQRP 3.6V Lithium Thionyl Chloride D-Size Battery Compatible with DSC ER34615M-T1 WT4911 WT4911B WT8911 ALEXOR Wireless Outdoor Siren WT4911BATT ADT

**Brand:** hqrp
**Price:** KD 11.45
**Availability:** ✅ In Stock

## Summary

> 🔋 Power your peace of mind — never miss a beat with HQRP’s high-capacity security battery!

## Quick Answers

- **What is this?** HQRP 3.6V Lithium Thionyl Chloride D-Size Battery Compatible with DSC ER34615M-T1 WT4911 WT4911B WT8911 ALEXOR Wireless Outdoor Siren WT4911BATT ADT by hqrp
- **How much does it cost?** KD 11.45 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/587878356-hqrp-3-6v-lithium-thionyl-chloride-d-size-battery-compatible)

## Best For

- hqrp enthusiasts

## Why This Product

- Trusted hqrp brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Peace of Mind Warranty:** 200 days coverage to keep your security system powered without worry.
- • **Seamless Compatibility:** Perfect fit for DSC ER34615M-T1, WT4911 series, ALEXOR, and ADT sirens.
- • **Smart Activation Protocol:** Follow simple depassivation steps to unlock full battery potential and avoid downtime.
- • **High Capacity for Extended Runtime:** 14.5Ah ensures your outdoor siren stays alert when it matters most.
- • **Reliable Lithium-Thionyl Chloride Chemistry:** Long-lasting 3.6V power designed for critical security devices.

## Overview

The HQRP 3.6V Lithium Thionyl Chloride D-Size Battery delivers a robust 14.5Ah capacity tailored for wireless outdoor sirens like DSC ER34615M-T1 and ADT models. Featuring advanced lithium-thionyl chloride chemistry, it ensures long-lasting, reliable power. Users must follow a depassivation process that can take up to 30 minutes to activate the battery fully, guaranteeing optimal performance. Backed by a 200-day warranty, this battery is engineered for seamless compatibility and dependable security system operation.

## Description

Buy HQRP 3.6V Lithium Thionyl Chloride D-Size Battery Compatible with DSC ER34615M-T1 WT4911 WT4911B WT8911 ALEXOR Wireless Outdoor Siren WT4911BATT ADT: Horns & Sirens - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Works great! - This battery was just what I needed. Before you just put it in and connect it like any other battery, be sure to follow the steps for depassivation if your siren requires it or else the battery will not register and charge correctly.
Review: Don’t waste your time and money - I tried 3 times to depassivate this product in my outdoor siren unit (each of my attempts timing out at 30 min). The strobe turned off followed by a single beep which indicates that the battery is dead or defective. Furthermore, after attempting to contact customer service, I received no reply.

## Features

- NOTE: It can take a unit up to 30 minutes to fully depassivate a battery. HQRP® Battery Replacement;
- Battery Voltage: 3.6V; Capacity: 14.5 Ah; Li-SOCI2; Lithium Thionyl Chloride;
- Compatible with Original Battery; 200 Days Warranty!
- Compatible with DSC ER34615M-T1 WT4911 WT4911B WT8911 Wireless Outdoor Siren WT4911BATT ALEXOR ADT;
- Please pay attention: After removing the battery, wait no less than 30 seconds before inserting the replacement battery. High-quality HQRP battery, designed to start working immediately after installation. If your device does not function right away, it may require a depassivation procedure to activate the battery fully. NOTE: Make sure to follow the steps below for a brand new battery on the unit or if a battery is being replaced.
- The WT4911 could lose power prematurely if a brand new battery is not used. 1. Hold the tamper switch closed before plugging the battery in. 2. Plug in the battery AND continue to hold the tamper for 10 seconds before releasing it. 3. Once the tamper is released, after the initial 10 seconds, the siren flashes the strobe in several different patterns to indicate it is in depassivation mode.
- 4. When depassivation is complete, the strobe lights shut off and the siren starts to beep 3 times every 5 seconds. NOTE: It can take a unit up to 30 minutes to fully depassivate a battery. If the WT4911/WT8911 determines that depassivation is not complete at the end of 30 minutes, it will automatically stop trying and beep once every 5seconds. If this occurs, the battery should be replaced.
- 5. Push in and then release the tamper switch. The WT4911/WT8911 will go into a normal power up sequence with 6 short beeps and flashes of the strobe lights. 6. The WT4911/WT8911 is then ready to be enrolled on the system or returned into service; NOTE: It can take a unit up to 30 minutes to fully depassivate a battery.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CNTKRM7S |
| Amperage | 14.5 Amps |
| Antenna Location | 3.6V Lithium Thionyl Chloride D-Size Battery Compatible with DSC ER34615M-T1 WT4911 WT4911B WT8911 ALEXOR Wireless Outdoor Siren WT4911BATT, wt4911 battery |
| Battery Capacity | 14.5 Amp Hours |
| Battery Cell Type | Lithium-Thionyl Chloride (Li-SOCL2) |
| Best Sellers Rank | #34,984 in Electronics ( See Top 100 in Electronics ) #134 in Security Horns & Sirens |
| Brand | HQRP |
| Customer Reviews | 3.7 3.7 out of 5 stars (163) |
| Manufacturer | HQRP |
| Model Number | 887774411222319 |
| Number of Batteries | 1 D batteries required. |
| UPC | 887774225385 |
| Unit Count | 1 Count |
| Voltage | 3.6 Volts (DC) |

## Product Details

- **Battery Capacity:** 14.5 Amp Hours
- **Battery Cell Composition:** Lithium-Thionyl Chloride (Li-SOCL2)
- **Brand:** HQRP
- **Number of Batteries:** 1 D batteries required.

## Images

![HQRP 3.6V Lithium Thionyl Chloride D-Size Battery Compatible with DSC ER34615M-T1 WT4911 WT4911B WT8911 ALEXOR Wireless Outdoor Siren WT4911BATT ADT - Image 1](https://m.media-amazon.com/images/I/61fEokIAnyL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works great!
*by E***N on January 4, 2024*

This battery was just what I needed. Before you just put it in and connect it like any other battery, be sure to follow the steps for depassivation if your siren requires it or else the battery will not register and charge correctly.

### ⭐ Don’t waste your time and money
*by C***S on August 27, 2025*

I tried 3 times to depassivate this product in my outdoor siren unit (each of my attempts timing out at 30 min). The strobe turned off followed by a single beep which indicates that the battery is dead or defective. Furthermore, after attempting to contact customer service, I received no reply.

### ⭐⭐⭐⭐⭐ Depassivated in under a minute. So it was a fresh battery!
*by S***N on August 16, 2025*

So glad this battery is still available from the same supplier. Previously I had bought this one from them and it lasted more than 2.5 years: https://a.co/d/6e1Cj80 The new one I got depressivated in just about 30 seconds so it was fresh! Just as I did with my previous review of the one linked above, I will continue to come back and update my experience with this battery. Before finding this brand and seller, I had gotten very frustrated trying to source quality replacements for my outdoor siren. The included instructions were great to have included so I didn't have to dig up my directions for starting the depassivation cycle.

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.com.kw/products/587878356-hqrp-3-6v-lithium-thionyl-chloride-d-size-battery-compatible](https://www.desertcart.com.kw/products/587878356-hqrp-3-6v-lithium-thionyl-chloride-d-size-battery-compatible)

---

*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-05-20*