VRLA Battery 12V 15AH | Dimension: 152x99x96x102mm
GRANKIA FG15-12 smf lead acid 12v 15ah vrla battery maintenance has the electrolyte absorbed in a fiber-glass mat separator. It is the most popular reserve power design because the electrolyte is captive, preventing it from spilling even when the case is punctured.
The charging reaction converts the lead sulfate at the negative electrode to lead. At the positive terminal the reaction converts the lead to lead oxide. As a by-product of this reaction, hydrogen is evolved. During the first part of the charging cycle, the conversion of lead sulfate to lead and lead oxide is the dominant reaction.
A valve regulated lead–acid (VRLA) battery, is a type of lead–acid battery characterized by a limited amount of electrolyte absorbed in a plate separator.
Sealed Lead Acid (SLA) and Valve Regulated Lead Acid (VRLA) are two different abbreviations for the same cell. Absorbed Glass Mat (AGM) is a form of SLA/VRLA in which the electrolytes are soaked into dividers across plates made out of sponge-like thin glass fibre matting.
VRLA batteries are considered “maintenance free” and require no addition of electrolyte or water.
Nominal Voltage | 12V(6 cells per unit) | |||
Design Floating Life @25℃ | 5 Years | |||
Nominal Capacity @25℃(20 hour [email protected],10.50V) | 14.5Ah | |||
Capacity @25℃ | 10 hour rate (1.36A,10.8V) | 13.6Ah | ||
5 hour rate (2.59A,10.5V) | 12.95Ah | |||
1 hour rate (9.47A,9.6V) | 9.47Ah | |||
Internal Resistance | Full Charged Battery@25℃ | ≤15.0mΩ | ||
Ambient Temperature | Discharge | -20℃~50℃ | ||
Charge | -20℃~50℃ | |||
Storage | -20℃~50℃ | |||
Max. Discharge Current@25℃ | 210A(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 4.35A
Voltage 13.6-13.8V |
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Cycle Use | Initial Charging Current Less than 4.35A
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 | 57.88 | 37.95 | 27.86 | 16.54 | 12.06 | 9.47 | 5.99 | 4.10 | 2.73 | 1.84 | 1.45 | 0.766 |
1.67V | 55.13 | 36.37 | 27.26 | 16.26 | 11.86 | 9.16 | 5.88 | 4.02 | 2.69 | 1.80 | 1.43 | 0.752 |
1.70V | 52.82 | 34.39 | 26.89 | 16.04 | 11.71 | 8.87 | 5.76 | 3.96 | 2.63 | 1.76 | 1.41 | 0.740 |
1.75V | 50.34 | 32.79 | 25.46 | 15.52 | 11.41 | 8.60 | 5.66 | 3.87 | 2.59 | 1.75 | 1.39 | 0.725 |
1.80V | 46.49 | 30.54 | 23.76 | 14.89 | 11.03 | 8.35 | 5.45 | 3.73 | 2.49 | 1.70 | 1.36 | 0.717 |
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 | 107.78 | 72.83 | 53.86 | 32.17 | 23.53 | 18.62 | 11.75 | 8.09 | 5.42 | 3.66 | 2.91 | 1.529 |
1.67V | 103.28 | 69.88 | 52.82 | 31.71 | 23.22 | 17.98 | 11.54 | 7.94 | 5.31 | 3.61 | 2.88 | 1.506 |
1.70V | 99.04 | 66.10 | 52.22 | 31.36 | 22.99 | 17.34 | 11.32 | 7.79 | 5.23 | 3.55 | 2.86 | 1.487 |
1.75V | 94.87 | 63.11 | 49.55 | 30.41 | 22.43 | 16.70 | 11.11 | 7.64 | 5.12 | 3.53 | 2.81 | 1.456 |
1.80V | 88.45 | 59.02 | 46.32 | 29.29 | 21.75 | 16.05 | 10.67 | 7.35 | 4.93 | 3.43 | 2.78 | 1.450 |