# Internal battery Ajax EN54 24h Rechargeable Li‑ion 7.4V 5Ah for alarm systems

**URL:** https://aio.lv/en/product--ajax-127877316bl--11578707
**Data updated:** 2026-02-15 18:38 (EET)
**Category:** Batteries
**Manufacturer:** Ajax
**Manufacturer code:** 127877.316.BL
**EAN:** 4823114073274
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 90.99 €
**Prices and availability valid until:** 2026-07-27 23:59
**Price without VAT (21%):** 75.20 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--ajax-127877316bl--11578707

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 16.07.2026 | free |
| Pickup points | 21.07.2026 | 1.89 EUR |
| Courier delivery to door | 21.07.2026 | 4.99 EUR |

## Summary description

Rechargeable internal Li‑ion battery Ajax EN54 designed to provide 24-hour backup power. Specifications: 7.4 V nominal voltage and 5 Ah capacity. Intended for compatible Ajax alarm and safety devices that require EN54-compliant backup. Ensures continuous operation during power outages and supports reliable system monitoring and alarm signaling.

## Long description

Ajax internal battery EN54 is a rechargeable Li‑ion backup battery designed to provide up to 24 hours of emergency power for compatible Ajax alarm and safety devices that require EN54‑compliant backup. With a nominal voltage of 7.4 V and a capacity of 5 Ah, this internal battery supports continuous operation during mains outages and maintains alarm signaling, event logging and monitored system status until primary power is restored or a controlled shutdown is performed.
Advantages
The battery offers a compact, factory‑tested Li‑ion construction that delivers stable voltage output and a high energy density for prolonged backup time relative to weight and size. Its 7.4 V nominal voltage and 5 Ah capacity are matched to the power demands of EN54‑compatible alarm modules, ensuring predictable discharge characteristics and reliable alarm transmission under load. Rechargeable chemistry reduces maintenance compared with single‑use cells and supports repeated charge/discharge cycles while maintaining consistent performance.
Подходит для
 Backup power for Ajax alarm control panels and EN54‑compliant safety modules
 Temporary power during mains failures to keep sensors and communicators active
 Systems requiring a rechargeable internal battery with predictable runtime
Key specifications
 Chemistry: Lithium‑ion (rechargeable)
 Nominal voltage: 7.4 V
 Rated capacity: 5 Ah
 Intended function: Internal backup power for alarm and safety devices
 Designed runtime: up to 24 hours under specified load conditions
 Form factor: compact internal module suitable for compatible enclosures
How to use
Install the internal battery into the specified compartment of a compatible Ajax alarm or EN54‑compliant safety device following the manufacturer's installation instructions. Ensure connectors are fully seated and polarity is correct before closing the enclosure. Charge the battery via the device's integrated charging circuit; initial charging and periodic charging are handled automatically by the host unit. After installation, verify system status and battery charge level through the alarm system interface or monitoring tools to confirm proper integration.
Usage recommendations
Store and operate the battery within the temperature and humidity ranges specified by the host device documentation. To maximize service life, avoid long‑term storage in a fully discharged or fully charged state; if storing for extended periods, keep the battery at approximately 40–60% charge and check charge level every few months. Replace the battery according to the alarm system maintenance schedule or when runtime degrades noticeably.

## FAQ

### How much does the Ajax EN54 24h Rechargeable Li‑ion 7.4V 5Ah battery cost, and is it available for purchase?

The price is 90.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 16.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Ajax EN54 24h Rechargeable Li‑ion 7.4V 5Ah battery be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Ajax products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Ajax service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11578707/68538642_large.webp