The 2081-9279 is a 12 V, 110 Ah sealed lead-acid standby battery for Simplex fire alarm systems. Simplex catalogs this part as 112-123. As a result, both numbers are commonly seen on parts lists and quotes.
Most Simplex fire alarm panels run on 24 VDC standby power. Therefore, two 2081-9279 batteries are typically wired in series to build the 24 V battery string. In addition, each battery weighs roughly 82 lbs (37 kg), so handling and installation usually call for two people.
What Makes the 2081-9279 Right for Simplex Panels
The 2081-9279 is a sealed lead-acid battery rated at 110 Ah on a 20-hour discharge curve. First, the cells use a lead-calcium grid for low self-discharge. Then, the flame arrester vent caps provide the safety feature required for indoor installation in a battery cabinet. Finally, the battery is sized to support code-required standby and alarm load for large Simplex installations.
Simplex publishes a storage life of up to 24 months at 68°F (20°C). However, capacity loss accelerates at higher storage temperatures. Therefore, rotate stock and date-stamp deliveries to avoid putting aged batteries into service.
Key Features
- 12 V, 110 Ah capacity (20-hour discharge rate)
- Two batteries wired in series for 24 V Simplex panel systems
- Sealed lead-acid construction — maintenance-free in normal service
- Lead-calcium grid with low self-discharge characteristics
- Flame arrester vent caps per UL Standard 924
- Up to 24 months storage life at 68°F (20°C)
- Meets DIN Standard 43539 deep-discharge performance
- High-current threaded terminal posts
Specifications
- Simplex part numbers: 2081-9279 / 112-123
- Voltage: 12 VDC
- Capacity: 110 Ah (20-hour discharge)
- Dimensions: 11 3/16″ W × 9″ H × 10 1/2″ D (284 × 230 × 267 mm)
- Weight: 82 lbs (37 kg) each
- Construction: Sealed lead-acid, lead-calcium grid
- Standards: UL 924 vent caps, DIN 43539 deep-discharge
Compatible Panels
The 2081-9279 is used with current Simplex addressable panels including the 4100ES, 4100, 4020, and 4010. In addition, Simplex specifies it for select conventional and intelligent platforms — confirm against your panel’s installation manual for the correct battery size and quantity.
Compatible Chargers & Cabinet
The 2081-9279 pairs with Simplex chargers 4100-0104, 4100-0114, and 4100-0124. Furthermore, the batteries require the 2081-9280 battery cabinet, which is ordered separately.
Order from Life Safety Consultants
Standby batteries are a routine but high-stakes line item. Specifically, ordering the wrong capacity or skipping the cabinet causes inspection failures and return trips. Our team can help confirm the right battery for your panel and walk through the cabinet and charger options.
For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com
Additional information
| Weight | 88.66 lbs |
|---|---|
| Dimensions | 11.25 × 10.59 × 8.18 in |
| Condition | New |
| Part Type | Batteries, Fire Alarm |
| Manufacturers | Simplex |
| Compatible Panels | 4100ES, 4100, 4020, 4010, 4005, 4002 |
| Cross Reference | 112-123 |
| Voltage | 12 V, Capacity: 110 Ah (20-hr rate), Dimensions: 11-3/16 in W x 9 in H x 10-1/2 in D (284 x 230 x 267 mm), Weight: 82 lbs (37 kg), Terminal: high-current posts, Compatible cabinet: 2081-9280 |
