Fire Alarm Batteries

Use this guide for your sealed lead acid batteries for any home security alarm system, or fire alarm system.
These batteries are used in most alarm systems by Digital Security, ADEMCO, Ansul NAPCO, ADT, Alarm Lock, Alcad, Light Alarm, CADDX and many others.
Alarm and fire alarm batteries usually come in standard sizes and the rating of the battery can be usually determined from the manufacturer's part number, (for example, a PowerSonic PS1240 is a 12V 4AH battery).
In some cases the alarm battery can be replaced with a higher rated battery. For example a 12V 4AH battery has the same dimensions as a 12V 5AH battery, so they are interchangable. The most common sizes are listed below.
  Type Length (inch) Width (inch) Height (inch) Weight (lb)
12V18AH-fire-alarm-battery 12V18AH 7.13 2.99 6.57 15
6V3.2AH-fire-alarm-battery 6V3.2AH 2.57 1.28 4.00 3
6V4.5AH-fire-alarm-battery 6V4.5AH 2.76 1.85 3.98 3
6V7AH-fire-alarm-battery 6V7AH 5.94 1.34 3.84 4
6V1.3AH-fire-alarm-battery 6V1.3AH 3.82 0.98 2.20 1
6V12AH-security-alarm-battery 6V12AH 5.94 1.97 3.84 5
ES4-12D-security-alarm-battery ES4-12D 7.68 1.85 1.85 5
12V5AH-security-alarm-battery 12V5AH 3.54 2.76 4.15 4
12V2.2AH-security-alarm-battery 12V2.2AH 7 1.4 2.4 3
12V3A-Hsecurity-alarm-battery 12V3AH 3.11 2.18 4.02 3
6V3AH-security-alarm-battery 6V3AH 5.27 1.34 2.56 3
12V35AH-security-alarm-battery 12V35AH 7.7 5.15 7.0 29
12V8AH-fire-alarm-battery 12V8AH 5.94 2.56 3.84 7
12V12AH-fire-alarm-battery 12V12AH 5.94 3.86 3.84 10
12V26AH-fire-alarm-battery 12V26AH 6.55 6.85 4.95 21