Introduction to Internal Battery NB — 7.2 V 95 Ah Ajax Hub BP 121874.313.NC
Internal battery NB (Ajax 121874.313.NC)is a purpose-built, maintenance-free primary lithium (thionyl chloride) battery pack designed specifically for internal installation in the Ajax Hub BP (BP Jeweller). With a nominal voltage of 7.2 V and a rated capacity of 95 Ah, this internal battery serves as a reliable main power source or a robust internal backup for security hubs that require long-lasting autonomy. Compact, light (≈ 1.0 kg), and delivered with a Molex internal connector for a neat installation, this pack is aimed at professional installers and security integrators seeking dependable power with minimal maintenance.
Key features at a glance
- Compatibility:Designed exclusively for the Ajax Hub BP (BP Jeweller).
- Voltage & capacity:Nominal 7.2 V; 95 Ah rated capacity for extended runtime.
- Chemistry:Non-rechargeable lithium (thionyl chloride) using ER34615 cells for low self-discharge.
- Form factor:Compact dimensions (135 × 65 × 105 mm) for internal mounting; Molex internal connector.
- Installation:Intended for internal installation by a qualified technician; battery parameters configurable in the Ajax PRO app.
- Safety & warranty:Primary non-rechargeable battery with a 24-month warranty — do not recharge; follow official installation and transport guidance.
Detailed specifications and benefits
The Internal Battery NB is engineered to meet the unique power requirements of a modern security control panel while addressing the practical demands of installers and end users. Below are the technical specifications followed by practical benefits that translate into real-world value.
- Model: 121874.313.NC (Internal battery NB 7.2V/95Ah)
- Chemistry: Non-rechargeable lithium (thionyl chloride), ER34615 cells
- Nominal voltage: 7.2 V
- Rated capacity: 95 Ah
- Maximum load: ≈ 700 mA (recommended max continuous)
- Connector: Molex (internal connector)
- Dimensions: 135 × 65 × 105 mm
- Weight: ≈ 1.0 kg
- Operating temperature: −10 °C to +40 °C
- Max relative humidity: Up to 75%
- Intended mounting: Internal installation in Ajax Hub BP casing
- Warranty: 24 months
- Safety: Primary non-rechargeable battery — do not recharge
- Long shelf life and low self-discharge:Thionyl chloride chemistry is chosen for its minimal self-discharge and stable long-term capacity retention. This means the battery remains ready for use even after extended storage, reducing replacement frequency and stock concerns for installers.
- High capacity in a compact package:95 Ah capacity in a roughly 1 kg package offers an excellent energy-to-weight ratio and a small footprint that fits inside the Hub BP housing without intrusive modifications.
- Professional integration:The Molex internal connector and compatibility with Ajax Hub BP ensure straightforward installation for trained technicians and seamless integration with Ajax’s configuration tools.
- Predictable load handling:The recommended maximum continuous load (~700 mA) provides a clear guideline for integrators to size systems, add peripherals, and estimate backup autonomy under typical operating conditions.
- Regulatory clarity and safety:Being a primary lithium pack, it comes with explicit handling and transport guidance. When installed and handled correctly, it offers a safe, maintenance-free power solution with minimal intervention.
Use cases and scenarios where the product excels
The Internal Battery NB is tailored for security systems where uninterrupted operation and compact, maintenance-free backup power are priorities. Typical scenarios where it stands out include:
Homes and small businesses using the Ajax Hub BP benefit from the battery’s high capacity and small size. For sites with modest power draw from sensors and communication modules, the 95 Ah pack delivers extended autonomy during grid outages, ensuring alarms, notifications and essential automation continue functioning until power is restored or a technician can attend.
Deployments in remote cabins, kiosks, or small field sites with infrequent maintenance visits require batteries that hold charge long-term and do not need periodic topping up. The low self-discharge of the thionyl chloride cells makes this pack ideal for such environments.
Critical areas where continuous monitoring is essential—server rooms, healthcare support areas, or retail sites—can rely on the Internal Battery NB as an internal power reservoir that reduces downtime risks from short-term power interruptions. Its predictable load characteristics help security designers model backup durations accurately.
Installers and integrators who prioritize tidy installations and reliability appreciate the internal mounting and Molex connector, which help keep the hub enclosure neat and compliant with best practices. The ability to configure battery parameters via the Ajax PRO app also simplifies commissioning and diagnostics.
Comparisons with similar products
When evaluating internal and backup batteries for security hubs, buyers often compare primary lithium packs, sealed lead-acid (SLA) batteries, and rechargeable lithium-ion solutions. Here’s how the Internal Battery NB positions itself:
- Vs. SLA batteries:SLA packs typically have lower energy density and higher weight for the same capacity. The Internal Battery NB offers a much higher capacity-to-size ratio and lower self-discharge, meaning longer shelf life and lower maintenance. However, unlike SLA batteries, this pack is non-rechargeable, so it must be replaced after depletion rather than recharged.
- Vs. rechargeable lithium-ion backup solutions:Rechargeable lithium-ion batteries provide repeatable charging cycles and can be used indefinitely with proper charge regulation. They are common in systems designed for continuous float charging. The Internal Battery NB, being primary (non-rechargeable), is intended as either a long-term non-serviced power source or as a backup for systems not designed for continuous float charging. The advantage is simpler installation where float charging is not available, and the trade-off is replacement after use.
- Vs. other primary lithium packs:The Internal Battery NB stands out for its specific compatibility with Ajax Hub BP, Molex internal connector, and the balance it strikes between capacity, size and operating temperature range. For integrators working within the Ajax ecosystem, it often represents the most straightforward and manufacturer-recommended option.
Customer testimonials and installer feedback
While individual experiences will vary by installation type and power draw, common themes from professional installers and end users reflect reliability, ease of fit and predictable performance. Below are representative comments from installers and customers who have used this battery in Ajax Hub BP systems:
- "As an installer, I appreciate the compact dimensions and Molex connector — it saves time at the service call and keeps the hub tidy. The 95 Ah capacity also gives customers peace of mind during longer outages."
- "We swapped SLA backups for this internal pack on a few retail hubs. The reduced weight and shelf life are real benefits for sites with sporadic maintenance."
- "Clear instructions and compatibility with Ajax made the commissioning process smoother. It’s important to note this is non-rechargeable, so we plan for replacements after use rather than recharging cycles."
These representative remarks underline the product’s strength in professional contexts. If you’re an end user, ask your installer for site-specific autonomy estimates based on your sensor and communicator load to understand how long the battery will last under outage conditions.
Conclusion: Why this product is a great choice
The Internal Battery NB — 7.2 V 95 Ah Ajax Hub BP 121874.313.NC is a well-matched power solution for Ajax Hub BP installations where dependable, compact, and low-maintenance backup power is needed. Its high capacity, low self-discharge chemistry, and manufacturer-focused design simplify installation and system planning for professionals. While it is a primary (non-rechargeable) battery—meaning it is not meant to be recharged and will require replacement after depletion—its advantages in energy density and storage stability make it a compelling option for residential, small commercial, and remote security applications.
For those deploying or maintaining Ajax Hub BP systems, this battery offers a balance of runtime, space efficiency and installation convenience. Combined with Ajax’s configuration tools and a professional installation, the Internal Battery NB helps ensure that security systems remain operational longer during power outages and that maintenance and inventory management for installers remain predictable. Always follow the Ajax installation manual and local regulations for handling and transport, and engage qualified technicians for installation to ensure safety and warranty coverage.
