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MSB-500-b.b.Battery2V500AH-Valve controlled sealed lead-acid batteries are suitable for uninterruptible power supply (UPS) systems, telecommunications systems, and industrial vehicles

SPECIFICATIONS**
- **Nominal Voltage:** 2V
- **Nominal Capacity:** 500Ah @ 10-hour rate F.V. (1.80V/cell)
- **Approx. Weight:** 36.0kg (79.4lbs.)
- **Terminals:** B6 (Fitting M8 bolt & nut), I3 is optional
- **Internal Resistance:** ≤0.8mΩ (Fully Charged)
- **Max. Discharge Current:** 2200A (5 sec.)
- **Max. Charge Current:** 125A
- **Operating Temperature Range:**
- **Charge:** 0°C ~ 40°C (32°F ~ 104°F)
- **Discharge:** -20°C ~ 50°C (-4°F ~ 122°F)
- **Storage:** -20°C ~ 40°C (-4°F ~ 104°F)
- **Opening Pressure:** 10 ~ 35 kPa
- **Container Material:** Standard: ABS (UL94 HB), MSB-500; Optional: Flame Retardant ABS (UL94 V-0), MSB-500FR

**DIMENSIONS (mm/inch)**
- **Length:** 241 ± 2.0 (9.49 ± 0.08)
- **Width:** 172 ± 2.0 (6.77 ± 0.08)
- **Container Height:** 331 ± 2.0 (13.03 ± 0.08)
- **Total Height:** 359 ± 2.0 (14.13 ± 0.08)

 b.b.battery-MSB-500 (2V, 500Ah)VRLA Rechargeable Battery

**APPLICATIONS**
- Telecom
- UPS (Uninterruptible Power Supply)
- Central Office
- Energy Storage Systems

**FEATURES**
- Sealed structure, no electrolyte leakage or spill
- High-performance alloy for corrosion resistance
- Unique electrolyte system for maximum service life
- Special paste formula promotes good charging acceptance
- Gel technology electrolyte
- Absorbent Glass Mat technology for efficient gas recombination

**SPECIFICATIONS**
- **Nominal Voltage:** 2V
- **Nominal Capacity:** 500Ah @ 10-hour rate F.V. (1.80V/cell)
- **Approx. Weight:** 36.0kg (79.4lbs.)
- **Terminals:** B6 (Fitting M8 bolt & nut), I3 is optional
- **Internal Resistance:** ≤0.8mΩ (Fully Charged)
- **Max. Discharge Current:** 2200A (5 sec.)
- **Max. Charge Current:** 125A
- **Operating Temperature Range:**
  - **Charge:** 0°C ~ 40°C (32°F ~ 104°F)
  - **Discharge:** -20°C ~ 50°C (-4°F ~ 122°F)
  - **Storage:** -20°C ~ 40°C (-4°F ~ 104°F)
- **Opening Pressure:** 10 ~ 35 kPa
- **Container Material:** Standard: ABS (UL94 HB), MSB-500; Optional: Flame Retardant ABS (UL94 V-0), MSB-500FR

**DIMENSIONS (mm/inch)**
- **Length:** 241 ± 2.0 (9.49 ± 0.08)
- **Width:** 172 ± 2.0 (6.77 ± 0.08)
- **Container Height:** 331 ± 2.0 (13.03 ± 0.08)
- **Total Height:** 359 ± 2.0 (14.13 ± 0.08)

**Constant Power Discharge Characteristics at 25°C/77°F (Unit: Watts)**
| Discharge Time | 30 Min | 1 Hr  | 2 Hr  | 3 Hr  | 4 Hr  |
|----------------|--------|-------|-------|-------|-------|
| F.V.           | 50.22  | 52.66 | 54.23 | -     | -     |
| 1.85V          | 655.8  | 727.5 | 797.0 | -     | -     |
| 1.80V          | 450.0  | 495.0 | 525.0 | 312.5 | 331.3 |
| 1.75V          | 289.5  | 312.5 | 333.3 | 238.9 | 251.5 |
| 1.70V          | 225.5  | 193.0 | 164.5 | 143.3 | 119.0 |

**Constant Current Discharge Characteristics at 25°C/77°F (Unit: Amps)**
| Discharge Time | 30 Min | 1 Hr  | 2 Hr  | 3 Hr  | 4 Hr  |
|----------------|--------|-------|-------|-------|-------|
| F.V.           | 350.0  | 240.0 | 152.5 | 117.9 | 92.5  |
| 1.85V          | 165.0  | 85.0  | 60.5  | -     | -     |
| 1.80V          | 390.0  | 265.0 | 125.0 | 102.0 | 72.5  |
| 1.75V          | 430.8  | 282.5 | 132.4 | 107.0 | -     |
| 1.70V          | 477.5  | 303.0 | 183.3 | 137.9 | 109.8 |
| 1.65V          | 511.3  | 315.3 | 188.3 | 142.5 | 67.5  |
| 1.60V          | 537.5  | 323.3 | 193.8 | 114.5 | 68.8  |

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