Internal Rechargeable Li‑ion Battery Ajax 7.4V 10Ah for 72h Backup (model 127878.324.WH)

Internal rechargeable Li‑ion battery by Ajax with a nominal voltage of 7.4 V and a capacity of 10 Ah, designed to provide up to 72 hours of backup power. This battery is intended as a replacement or spare for compatible Ajax devices, enabling uninterrupted operation of security and alarm systems during mains power interruptions. The design and chemistry of the cell offer stable output, compact dimensions for internal installation and predictable charge retention when used according to manufacturer recommendations.

Advantages

The Ajax internal rechargeable Li‑ion battery delivers a high energy density in a compact form factor, enabling extended backup time without significantly increasing device size. Its 7.4 V nominal voltage and 10 Ah capacity provide predictable runtime for connected equipment, and the Li‑ion chemistry ensures lower self-discharge compared with older battery types. Designed for internal mounting and integration with Ajax systems, the battery supports safe charging management when paired with compatible chargers and controllers.

Suitable for

• Backup power for Ajax alarm control panels and security devices
• Replacement or spare battery in compatible Ajax systems
• Use during mains power outages to maintain continuous monitoring and communications
• Applications where compact internal batteries with long runtime are required

Key specifications

• Chemistry: Lithium‑ion (Li‑ion)
• Nominal voltage: 7.4 V
• Rated capacity: 10 Ah
• Estimated backup duration: up to 72 hours (depending on device load and configuration)
• Intended installation: internal mounting inside compatible devices
• Typical characteristics: low self-discharge, high energy density, rechargeable

How to use

Install the battery only in devices specified by the manufacturer or by qualified personnel following the device service manual. Ensure the device is powered down or disconnected from mains according to the manufacturer’s instructions before performing replacement. Connect the battery to the device’s battery connector, secure it in the mounting location, and restore power. Allow the device to perform its initial charging and battery calibration cycle as indicated in the device documentation to ensure accurate runtime estimates.

Recommendations

Store the battery in a dry, cool place and avoid exposure to high temperatures or direct sunlight. Use only compatible chargers and follow Ajax guidelines for installation, charging, and disposal. Do not disassemble, puncture or expose the battery to fire. For safety and warranty compliance, have replacement or internal installation performed by authorized or qualified technicians.