Replacement internal rechargeable battery pack for Ajax hubs and range extenders. Suitable for Hub, Hub Plus, Hub 2, ReX and ReX2 (verify connector type before ordering). Designed for intruder-alarm use with long shelf life and slow self-discharge.

• Nominal voltage: 3.7 V
• Capacity: 2000 mAh (2 Ah)
• Chemistry: rechargeable lithium (Li‑ion / Li‑polymer style)
• Connector: 2‑pin or 3‑pin variant — check your hub manufacture date and connector before purchase
• Intended use: internal replacement battery for Ajax control hubs and extenders (not a general-purpose cell)

Who is this for? DIY installers and professional contractors replacing an end‑of‑life or faulty internal battery in Ajax hubs and repeaters. Confirm connector type and follow official Ajax replacement guidance.

Safety & compliance notes (typical UK guidance):

• Follow Ajax Systems replacement instructions and isolate mains power before replacing the internal battery.
• Do not crush, puncture or incinerate. Use only as intended in manufacturer’s equipment.
• Dispose of spent batteries at an authorised recycling point in accordance with UK/EU battery regulations.
• If unsure, ask a qualified installer or contact Ajax support for compatibility guidance.

For installation and connector details see Ajax support: How to replace hub accumulator. For run‑time planning, see Ajax battery tools. Reseller SKUs and references: ITM003231; common reseller numbers include 22259.