## Technical Overview of the LC-R122R2P The **LC-R122R2P** is a Valve Regulated Lead-Acid (VRLA) rechargeable battery manufactured by Panasonic. It is part of the "R series" (Main Power) designed specifically for high-performance cyclic and standby applications. ### 1. General Specifications | Feature | Specification | | :--- | :--- | | **Nominal Voltage** | 12V | | **Nominal Capacity** | 2.2Ah (20-hour rate) | | **Terminal Type** | Faston 187 (4.75mm width) | | **Battery Chemistry** | Lead-Acid (AGM - Absorbent Glass Mat) | | **Weight** | Approx. 0.80 kg (1.76 lbs) | | **Case Material** | Flame Retardant (UL94 V-0) or Standard (HB) | --- ### 2. Key Electronic Characteristics The internal construction of the LC-R122R2P involves several critical electronic and chemical properties: * **Internal Resistance:** Approx. 55 mΩ (fully charged). This low internal resistance allows for efficient discharge and recharge cycles. * **Charging Voltage (Cycle Use):** 14.5V to 14.9V (at 25°C). * **Charging Voltage (Standby Use):** 13.6V to 13.8V (at 25°C). * **Maximum Charging Current:** 0.33A (to prevent overheating and venting). * **Temperature Compensation:** Like most lead-acid batteries, the charging voltage must be adjusted based on ambient temperature to prevent thermal runaway. --- ### 3. Construction and Components The "electronic" functionality is supported by the physical architecture of the cell: 1. **Lead-Tin Alloy Grids:** Used for the plates to minimize corrosion and extend the service life. 2. **AGM Separator:** A micro-porous glass fiber mat that absorbs the electrolyte. This makes the battery **leak-proof** and allows it to be mounted in any orientation (except inverted). 3. **One-way Vent Valve:** A safety mechanism that releases excess gas if the internal pressure builds up too high during overcharging, preventing the casing from rupturing. --- ### 4. Typical Applications The LC-R122R2P is commonly found in the following electronic systems: * **UPS Systems:** Small uninterruptible power supplies for networking gear. * **Security Systems:** Backup power for alarm panels and CCTV. * **Medical Equipment:** Portable monitoring devices. * **Emergency Lighting:** Powering exit signs and emergency lamps during outages.