VRLA Battery 12V 18AH | Dimension: 181x77x167x167mm
GRANKIA FG18-12 valve regulated sealed lead acid 12v 18ah battery has been specifically designed for general purpose and standby applications. Lead acid 12v 18ah battery offers excellent performance in a wide range of applications. It is including security and fire systems, medical devices, emergency lighting and UPS systems.
The grid structure of the lead acid battery is made from a lead alloy. This battery is a premier, general duty sealed lead-acid battery using absorbent glass mat (AGM) technology to suspend electrolyte in a leak-proof, maintenance-free design.
An 18 Ah battery can produce a current which, when multiplied by the time (in hours) the battery can supply it, equals 18.
So your 12V 18ah battery is actually a ~216 watt hour battery. Watts=Amps×Volts, so Amps taken by the bulb = 25/12= 2.1 Amps. The battery will power the bulb 18/2.1 hours=8.57 hours approximately.
The 12V 18.00Ah battery offers excellent performance in a wide range of applications including security and fire systems, medical devices, emergency lighting and UPS systems.
Nominal Voltage | 12V(6 cells per unit) | |||
Design Floating Life @25℃ | 5 Years | |||
Nominal Capacity @25℃(20 hour [email protected],10.50V) | 18Ah | |||
Capacity @25℃ | 10 hour rate (1.69A,10.8V) | 16.9Ah | ||
5 hour rate (3.21A,10.5V) | 16.05Ah | |||
1 hour rate (11.75A,9.6V) | 11.75Ah | |||
Internal Resistance | Full Charged Battery@25℃ | ≤17.0mΩ | ||
Ambient Temperature | Discharge | -20℃~50℃ | ||
Charge | -20℃~50℃ | |||
Storage | -20℃~50℃ | |||
Max. Discharge Current@25℃ | 270A(5s) | |||
Capacity affected by Temperature
(10 hr Capacity ) |
40℃ | 102% | ||
25℃ | 100% | |||
0℃ | 85% | |||
-15℃ | 65% | |||
Self-Discharge@25℃ per Month | 3% | |||
Charge (Constant Voltage) @25℃ | Standby Use | Initial Charging Current Less than 5.4A
Voltage 13.6-13.8V |
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Cycle Use | Initial Charging Current Less than 5.4A
Voltage 14.4-14.9V |
Discharge Constant Current per Cell (Amperes at 25°C)
F.V/Time | 5min | 10min | 15min | 30min | 45min | 1h | 2h | 3h | 5h | 8h | 10h | 20h |
1.60V | 71.85 | 47.11 | 34.59 | 20.53 | 14.97 | 11.75 | 7.43 | 5.09 | 3.39 | 2.28 | 1.80 | 0.951 |
1.67V | 68.44 | 45.15 | 33.84 | 20.19 | 14.73 | 11.37 | 7.30 | 4.99 | 3.34 | 2.23 | 1.78 | 0.933 |
1.70V | 65.57 | 42.69 | 33.38 | 19.92 | 14.54 | 11.01 | 7.15 | 4.91 | 3.27 | 2.19 | 1.75 | 0.918 |
1.75V | 62.50 | 40.71 | 31.60 | 19.26 | 14.16 | 10.67 | 7.02 | 4.81 | 3.21 | 2.17 | 1.72 | 0.900 |
1.80V | 57.71 | 37.92 | 29.49 | 18.49 | 13.69 | 10.36 | 6.76 | 4.63 | 3.09 | 2.11 | 1.69 | 0.890 |
Discharge Constant Power per Cell (Watts at 25°C)
F.V/Time | 5min | 10min | 15min | 30min | 45min | 1h | 2h | 3h | 5h | 8h | 10h | 20h |
1.60V | 133.79 | 90.41 | 66.86 | 39.93 | 29.21 | 23.12 | 14.58 | 10.04 | 6.73 | 4.54 | 3.61 | 1.898 |
1.67V | 128.21 | 86.75 | 65.57 | 39.37 | 28.83 | 22.32 | 14.32 | 9.86 | 6.59 | 4.48 | 3.58 | 1.869 |
1.70V | 122.94 | 82.05 | 64.83 | 38.93 | 28.54 | 21.52 | 14.06 | 9.67 | 6.49 | 4.41 | 3.55 | 1.846 |
1.75V | 117.77 | 78.34 | 61.51 | 37.75 | 27.85 | 20.73 | 13.80 | 9.49 | 6.36 | 4.38 | 3.49 | 1.808 |
1.80V | 109.80 | 73.27 | 57.50 | 36.36 | 27.00 | 19.93 | 13.25 | 9.12 | 6.12 | 4.26 | 3.45 | 1.800 |