CSB GP645 Valve Regulated Sealed Lead Acid Battery 6V 4.5Ah
The CSB GP645 is a 6V 4.5Ah Valve Regulated Sealed Lead Acid Battery built on AGM technology, with a float charge voltage range of 6.75-6.90Vdc and a design float life of up to 5 years; it is suitable for general backup power applications such as security, emergency lighting, and medical equipment.
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Product Features
- Valve Regulated Lead Acid (VRLA) design
- Absorbent Glass Mat (AGM) technology enables up to 99% gas recombination efficiency with no routine maintenance required
- Pure lead plates with proprietary formulation elements
- Suitable for float charge backup power applications
- Manufactured to IEC 60896-21/22:2004 and UL1989 certified (MH14533)
Application Scenarios
- Backup power for security alarm panels
- Emergency lighting and exit sign devices
- Backup power for medical monitors and infusion pumps
- Access control systems and building intercom equipment
- Fire alarm and linkage control panels
- Small electronic instruments and testing equipment
Product parameters
- Model：GP645
- Voltage：6 Vdc
- Nominal Capacity：4.5 Ah @20hr-rate
- Ah Capacity：4.24 (8-Hr 1.75VPC @ 25°C)
- Ah Capacity：4.58 (20-Hr 1.75VPC @ 25°C)
- Ah Capacity：4.18 (8-Hr 1.80VPC @ 25°C)
- Max. Charge Current：1.35 A
- Max. Discharge Current：60(F1) / 90(F2) (5 sec)
- Short Circuit Current：151 (5 sec)
- Internal Resistance：(m ) Approx. 18.5 mΩ
- Terminal Type：F1-90 terminal (Faston Tab 187) / F2 terminal (Faston Tab 250)
- Container Material：ABS (UL 94-HB) standard, flame-retardant (94-V0) available upon request
- Weight：0.87 / 1.92 kg / lb.
- Length (L)：70.0±1.0 / 2.76±0.04 mm / in
- Width (W)：48.0±1.0 / 1.89±0.04 mm / in
- Height (H)：106.6±1.5 / 4.20±0.06 (F1 Terminal) 107.5±1.5 / 4.23±0.06 (F2 Terminal)
- Design Life：Up to 5 years in standby service at 25°C; Eurobat (20°C): 3-5 years, Standard Commercial
- Float Charging Voltage：6.75 - 6.90 Vdc/battery
- Equalizing Charging Voltage：7.20 - 7.50 Vdc/battery
- Operating Temperature：discharge -15°C to 50°C; charge/storage -15°C to 40°C
Product details
The CSB GP645 is a general purpose Valve Regulated Sealed Lead Acid Battery in the GP series, with a nominal voltage of 6Vdc and a nominal capacity of 4.5Ah (20hr-rate). At 25°C, the 20-hour rate capacity reaches 4.58Ah, while the 8-hour rate capacity is 4.24Ah (1.75VPC) or 4.18Ah (1.80VPC). The battery utilizes a Valve Regulated Sealed Lead Acid construction and Absorbent Glass Mat (AGM) technology, achieving a gas recombination efficiency of up to 99%. It features a maintenance-free design, along with a pure lead construction and proprietary element formulation, specifically for float charge backup power applications.
In terms of electrical parameters, the GP645 has a maximum charge current of 1.35A; the maximum discharge current is 60A (F1 terminal) or 90A (F2 terminal), both based on 5-second conditions; the short-circuit current is 151A (5 seconds); and the internal resistance is approximately 18.5mΩ. At 25°C, the float charge voltage is 6.75 to 6.90Vdc, and the equalization charge voltage is 7.20 to 7.50Vdc. Self-discharge performance: after 90 days of storage at 25°C, the remaining capacity is still above 90%, with a maximum storage of 6 months, which can be extended to 10 months with equalization charging; the battery must be fully charged before use, and if the storage temperature exceeds 25°C, it needs to be charged in advance.
In terms of dimensions and terminals, the GP645 is 70.0±1.0mm long, 48.0±1.0mm wide, with an F1 terminal height of 106.6±1.5mm and an F2 terminal height of 107.5±1.5mm, weighing 0.87kg. Terminal types include F1 (Faston Tab 187) and F2 (Faston Tab 250). The case is made of ABS (UL 94-HB) material, and a flame-retardant (94-V0) version is available upon request.
In terms of temperature adaptability, the GP645 has a nominal operating temperature of 25°C, a discharge temperature range of -15°C to 50°C, and a charge and storage temperature range of -15°C to 40°C. For design life, it is 5 years under 25°C float charge backup conditions, and 3 to 5 years commercial-grade life under the Eurobat (20°C) standard. The product is manufactured according to IEC 60896-21/22:2004 and is recognized under UL1989 (MH14533).
Based on the above features, the GP645 is suitable for general purpose scenarios positioned by the GP series, covering backup power applications such as security systems, emergency lighting, and medical equipment. The maintenance-free, low self-discharge, and float charge backup design make it suitable for occasions requiring continuous standby power supply. Users should arrange charging and storage based on ambient temperature and depth of discharge to maintain the battery in normal operating condition.
