FG250-12 best sealed deep cycle lead acid battery 12v 250ah
VRLA Battery 12V 250AH | Dimension: 520x268x220x224mm
The FG250-12 12V 250Ah deep cycle battery is a high-capacity sealed AGM lead acid battery. It is engineered for long-lasting and stable power delivery. Designed with advanced VRLA (Valve Regulated Lead Acid) technology, it provides reliable performance in demanding applications. These include solar energy systems, UPS backup, telecom, and industrial power storage.
GRANKIA FG250-12 best sealed deep cycle lead acid battery 12v 250ah is to charge and discharge regularly, and provide a steady stream of power.
The sealed deep cycle lead acid battery 12v 250ah is made up of cells, each cell consists of plates immersed in an electrolyte of dilute sulfuric acid.
This deep cycle lead acid battery is designed for repeated deep discharge cycles. It ensures consistent energy output. It also offers extended service life. These features make it an ideal solution for both commercial and residential energy storage.
FG250-12 best sealed deep cycle lead acid battery 12v 250ah
Deep Cycle Lead Acid Battery Features
1.) AGM technology
AGM stands for Absorbent Glass Mat. In these batteries the electrolyte is absorbed into a glass-fibre mat between the plates by capillary action.
2.) Low self-discharge
Storing batteries at lower temperatures. It will reduce the rate of self-discharge and preserves the initial energy.
3.) VRLA technology
VRLA stands for Valve Regulated Lead Acid, which means that the batteries are sealed.
4.) Maintenance-Free Design
Minimises technician time spent at site and on battery related callouts.
5.) Anti Buckle Separators
Internal plate buckling can kill a battery outright or simply reduce its lifespan. Our AGM separators gives the plates extra support to eliminate buckling.
VRLA Battery Applications
- Uninterrupted power supply(UPS)
- Automotive and traction applications
- Lighting equipment, fire alarms and security systems
- Communication and telecom system
- Solar energy system
- High current drain applications
- Fire alarms and security systems
- Portable VTR/TV, tape recorders, radios, etc.
- Various power toys and recreational equipment
- Emergency power supplies in power generation plants and substations
- Golf Cart
AGM Battery Details
Battery Storage Characteristics
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Advantage of Deep Cycle Lead Acid Battery
The 12V 250Ah sealed lead acid battery uses advanced lead-calcium alloy grids and high-density active materials to deliver superior cycle performance and durability. Compared with traditional flooded batteries, AGM batteries provide:
- Better vibration resistance
- Faster recharge efficiency
- Lower maintenance requirements
- Enhanced safety with sealed structure
This makes it a preferred choice for deep cycle solar batteries, UPS battery backup systems, and off-grid energy storage solutions.
Deep Cycle Battery FAQ
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Are lead-acid deep cycle batteries good?
You should discharge and recharge deep cycle batteries regularly. Strong plates inside them allow you to completely drain their power repeatedly without damaging the battery itself.
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Should you keep lead acid battery fully charged?
You must always store lead acid batteries in a charged state. Apply a topping charge every 6 months to prevent the voltage from dropping below 2.05V/cell and causing the battery to sulfate.
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Can you continuously charge a lead acid battery?
Overcharging a lead acid battery can be just as harmful as undercharging it. If workers leave the battery in a continuously charging state for long periods of time, corrosion of the positive battery plates can occur.
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| Nominal Voltage | 12V(6 cells per unit) | |||
| Design Floating Life @25℃ | 10 Years | |||
| Nominal Capacity @25℃(10 hour rate@25.00A,10.80V) | 250Ah | |||
| Capacity @25℃ | 20 hour rate (13.38A,10.5V) | 267.6Ah | ||
| 5 hour rate (44.0A,10.5V) | 220.0Ah | |||
| 1 hour rate (159.5A,9.6V) | 159.5Ah | |||
| Internal Resistance | Full Charged Battery@25℃ | ≤2.6mΩ | ||
| Ambient Temperature | Discharge | -20℃~50℃ | ||
| Charge | -20℃~50℃ | |||
| Storage | -20℃~50℃ | |||
| Max. Discharge Current@25℃ | 2000A(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 50A
Voltage 13.6-13.8V |
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| Cycle Use | Initial Charging Current Less than 50A
Voltage 14.4-14.9V |
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Discharge Constant Current per Cell (Amperes at 25°C)
| F.V/Time | 15min | 30min | 45min | 1h | 2h | 3h | 5h | 6h | 8h | 10h | 20h |
| 1.60V | 451.3 | 265.8 | 201.3 | 159.5 | 93.8 | 69.0 | 46.5 | 40.5 | 31.8 | 26.3 | 13.88 |
| 1.67V | 426.3 | 251.8 | 193.5 | 154.8 | 90.8 | 66.8 | 45.8 | 39.8 | 31.5 | 25.8 | 13.75 |
| 1.70V | 400.3 | 244.5 | 186.5 | 148.8 | 88.3 | 65.0 | 44.8 | 39.0 | 31.0 | 25.5 | 13.55 |
| 1.75V | 375.0 | 233.8 | 178.3 | 142.8 | 86.0 | 63.5 | 44.0 | 38.3 | 30.5 | 25.3 | 13.38 |
| 1.80V | 351.8 | 225.3 | 171.8 | 137.8 | 82.8 | 61.5 | 43.0 | 37.5 | 30.0 | 25.0 | 13.25 |
Discharge Constant Powerper Cell (Watts at25°C)
| F.V/Time | 15min | 30min | 45min | 1h | 2h | 3h | 5h | 6h | 8h | 10h | 20h |
| 1.60V | 862.8 | 527.8 | 382.3 | 306.0 | 177.8 | 131.8 | 89.8 | 78.3 | 62.0 | 51.3 | 27.4 |
| 1.67V | 825.5 | 494.8 | 369.3 | 297.8 | 173.0 | 128.3 | 88.3 | 77.0 | 61.5 | 50.8 | 27.2 |
| 1.70V | 769.3 | 484.0 | 357.5 | 287.5 | 169.0 | 125.3 | 87.0 | 76.0 | 60.8 | 50.3 | 26.9 |
| 1.75V | 721.8 | 460.8 | 343.3 | 277.0 | 165.0 | 122.8 | 85.8 | 74.8 | 60.0 | 49.8 | 26.6 |
| 1.80V | 677.5 | 442.0 | 331.8 | 268.0 | 159.5 | 119.3 | 84.0 | 73.5 | 59.3 | 49.5 | 26.4 |
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