MSB-300-B.B.Battery2V300AH-Valve controlled sealed lead-acid batteries are suitable for uninterruptible power supply (UPS) systems, telecommunications systems, and industrial vehicles

B.B.BATTERY-MSB-300 (2V, 300Ah) VRLA Rechargeable Battery

**Features**
- Sealed structure, no electrolyte leakage or spill.
- Suitable for telecom, UPS, central office, and energy storage systems.
- High-performance alloy ensures corrosion resistance.
- Unique electrolyte system achieves maximum service life.
- Special paste formula promotes good charging acceptance.
- Electrolyte with gel technology.
- Absorbent Glass Mat technology for efficient gas recombination.

**Specifications**
- **Nominal Voltage:** 2V
- **Nominal Capacity:** 300Ah @ 10-hour rate (1.80V/cell)
- **Approx. Weight:** 21.2Kg (46.7lbs.)
- **Terminals:** B6 (Fitting M8 bolt & nut), I3 is optional
- **Internal Resistance:** ≤1.0mΩ (Fully Charged)
- **Max. Discharge Current:** 1350A (5 sec.)
- **Max. Charge Current:** 75A
- **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)
- **Safety Valve:** Opening pressure 10 ~ 35 kPa
- **Container Material:** MH19884

**Dimensions (mm/inch)**
- **Length:** 171 ± 2.0 (6.73 ± 0.08)
- **Width:** 171 ± 2.0 (6.73 ± 0.08)
- **Container Height:** 151 ± 2.0 (5.94 ± 0.08)
- **Total Height:** 358 ± 2.0 (14.09 ± 0.08)

**Constant Power Discharge Characteristics at 25°C/77°F (Unit: W)**
| Discharge Time | 30 Min | 1 Hr | 2 Hr | 3 Hr | 4 Hr | 5 Hr | 6 Hr | 8 Hr | 10 Hr | 12 Hr | 20 Hr |
|----------------|--------|------|------|------|------|------|------|------|-------|-------|-------|
| 1.85V          | 393.5  | 270.0| 173.7| 135.3| 105.2| 90.6 | 80.7 | 66.8 | 55.8  | 48.3  | 63.0  |
| 1.80V          | 297.0  | 98.7 | 86.0 | 59.1 | 43.6 | 18.8 | 14.3 | 11.5 | 7.1   | -     | -     |
| 1.75V          | 89.7   | 73.7 | 52.4 | 35.3 | 53.6 | 47.8 | 31.5 | 19.8 | 15.1  | 12.1  | 10.3  |
| 1.70V          | 52.5   | 63.8 | 33.6 | 20.5 | 15.6 | 12.3 | 10.6 | 9.2  | 7.5   | -     | -     |
| 1.65V          | 56.4   | 34.7 | 9.4  | 7.6  | 6.4  | 5.4  | 20.8 | 15.9 | 12.6  | 10.7  | 6.5   |
| 1.60V          | 57.5   | 34.9 | 21.1 | 16.1 | 12.8 | 10.9 | 9.4  | 7.7  | 5.5   | 4.7   | -     |

**Constant Current Discharge Characteristics at 25°C/77°F (Unit: A)**
| Discharge Time | 30 Min | 1 Hr | 2 Hr | 3 Hr | 4 Hr | 5 Hr | 6 Hr | 8 Hr | 10 Hr | 12 Hr | 20 Hr |
|----------------|--------|------|------|------|------|------|------|------|-------|-------|-------|
| 1.85V          | 210.0  | 234.0| 258.5| 286.5| 144.0| 159.0| 169.5| 181.8| 91.5  | 99.0  | 105.5 |
| 1.80V          | 110.0  | 70.7 | 75.0 | 79.4 | 82.8 | 55.5 | 61.2 | 64.2 | 65.9  | 47.0  | 51.0  |
| 1.75V          | 54.0   | 55.8 | 40.5 | 43.5 | 46.5 | 48.0 | 33.0 | 36.3 | 38.0  | 39.3  | 28.1  |
| 1.70V          | 24.3   | 25.7 | 26.9 | 27.6 | 15.1 | 16.0 | 16.7 | 17.2 | 18.1  | -     | -     |
| 1.65V          | 10.1   | 7.0  | 7.5  | 7.9  | 8.2  | 5.5  | 6.1  | 6.4  | 6.9   | -     | -     |
| 1.60V          | 9.4    | 6.5  | 6.9  | 7.2  | 7.4  | 4.8  | 5.